Mister Exam
Other calculators
- Canonical form of a elliptical paraboloid
- Canonical form of a double hyperboloid
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- Canonical form of a degenerate ellipse
- Canonical form of a parabola
-
How to use it?
- Canonical form:
- y*y-6*x-6*y-15=0
- x^2+y^2-25=0
- x^2+y^2-z^2-2*x-4*y+6=0
- 5x^2-y^2+20x+4y-9
- Plot:
- x-y=3
-
x=449.4*(y/10000-1)*(5/(1.4*(6*y/100000+1)))^(1/2)
- (z*cos(pi/4)-x*sin(pi/4))^2=(z*sin(pi/4)+(x-2)*cos(pi/4))^2+(y-5)^2
- x^2+y^2=z^2
-
Identical expressions
- y*y- six *x- six *y- fifteen = zero
- y multiply by y minus 6 multiply by x minus 6 multiply by y minus 15 equally 0
- y multiply by y minus six multiply by x minus six multiply by y minus fifteen equally zero
- yy-6x-6y-15=0
- y*y-6*x-6*y-15=O
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Similar expressions
- y*y-6*x+6*y-15=0
- y*y-6*x-6*y+15=0
- y*y+6*x-6*y-15=0
y*y-6*x-6*y-15=0 canonical form
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The solution
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2 -15 + y - 6*x - 6*y = 0
$$- 6 x + y^{2} - 6 y - 15 = 0$$
-6*x + y^2 - 6*y - 15 = 0
Detail solution
Given line equation of 2-order:
$$- 6 x + y^{2} - 6 y - 15 = 0$$
This equation looks like:
$$a_{11} x^{2} + 2 a_{12} x y + 2 a_{13} x + a_{22} y^{2} + 2 a_{23} y + a_{33} = 0$$
where
$$a_{11} = 0$$
$$a_{12} = 0$$
$$a_{13} = -3$$
$$a_{22} = 1$$
$$a_{23} = -3$$
$$a_{33} = -15$$
To calculate the determinant
$$\Delta = \left|\begin{matrix}a_{11} & a_{12}\\a_{12} & a_{22}\end{matrix}\right|$$
or, substitute
$$\Delta = \left|\begin{matrix}0 & 0\\0 & 1\end{matrix}\right|$$
$$\Delta = 0$$
Because
$$\Delta$$
is equal to 0, then
$$\left(\tilde y - 3\right)^{2} = 6 \tilde x + 24$$
$$\tilde y'^{2} = 6 \tilde x + 24$$
Given equation is by parabola
- reduced to canonical form
The center of the canonical coordinate system in OXY
$$x_{0} = \tilde x \cos{\left(\phi \right)} - \tilde y \sin{\left(\phi \right)}$$
$$y_{0} = \tilde x \sin{\left(\phi \right)} + \tilde y \cos{\left(\phi \right)}$$
$$x_{0} = 0 \cdot 0$$
$$y_{0} = 0 \cdot 0$$
$$x_{0} = 0$$
$$y_{0} = 0$$
The center of canonical coordinate system at point O
Basis of the canonical coordinate system
$$\vec e_1 = \left( 1, \ 0\right)$$
$$\vec e_2 = \left( 0, \ 1\right)$$
$$- 6 x + y^{2} - 6 y - 15 = 0$$
This equation looks like:
$$a_{11} x^{2} + 2 a_{12} x y + 2 a_{13} x + a_{22} y^{2} + 2 a_{23} y + a_{33} = 0$$
where
$$a_{11} = 0$$
$$a_{12} = 0$$
$$a_{13} = -3$$
$$a_{22} = 1$$
$$a_{23} = -3$$
$$a_{33} = -15$$
To calculate the determinant
$$\Delta = \left|\begin{matrix}a_{11} & a_{12}\\a_{12} & a_{22}\end{matrix}\right|$$
or, substitute
$$\Delta = \left|\begin{matrix}0 & 0\\0 & 1\end{matrix}\right|$$
$$\Delta = 0$$
Because
$$\Delta$$
is equal to 0, then
$$\left(\tilde y - 3\right)^{2} = 6 \tilde x + 24$$
$$\tilde y'^{2} = 6 \tilde x + 24$$
Given equation is by parabola
- reduced to canonical form
The center of the canonical coordinate system in OXY
$$x_{0} = \tilde x \cos{\left(\phi \right)} - \tilde y \sin{\left(\phi \right)}$$
$$y_{0} = \tilde x \sin{\left(\phi \right)} + \tilde y \cos{\left(\phi \right)}$$
$$x_{0} = 0 \cdot 0$$
$$y_{0} = 0 \cdot 0$$
$$x_{0} = 0$$
$$y_{0} = 0$$
The center of canonical coordinate system at point O
(0, 0)
Basis of the canonical coordinate system
$$\vec e_1 = \left( 1, \ 0\right)$$
$$\vec e_2 = \left( 0, \ 1\right)$$
Invariants method
Given line equation of 2-order:
$$- 6 x + y^{2} - 6 y - 15 = 0$$
This equation looks like:
$$a_{11} x^{2} + 2 a_{12} x y + 2 a_{13} x + a_{22} y^{2} + 2 a_{23} y + a_{33} = 0$$
where
$$a_{11} = 0$$
$$a_{12} = 0$$
$$a_{13} = -3$$
$$a_{22} = 1$$
$$a_{23} = -3$$
$$a_{33} = -15$$
The invariants of the equation when converting coordinates are determinants:
$$I_{1} = a_{11} + a_{22}$$
$$I_{3} = \left|\begin{matrix}a_{11} & a_{12} & a_{13}\\a_{12} & a_{22} & a_{23}\\a_{13} & a_{23} & a_{33}\end{matrix}\right|$$
$$I{\left(\lambda \right)} = \left|\begin{matrix}a_{11} - \lambda & a_{12}\\a_{12} & a_{22} - \lambda\end{matrix}\right|$$
substitute coefficients
$$I_{1} = 1$$
$$I_{3} = \left|\begin{matrix}0 & 0 & -3\\0 & 1 & -3\\-3 & -3 & -15\end{matrix}\right|$$
$$I{\left(\lambda \right)} = \left|\begin{matrix}- \lambda & 0\\0 & 1 - \lambda\end{matrix}\right|$$
$$I_{1} = 1$$
$$I_{2} = 0$$
$$I_{3} = -9$$
$$I{\left(\lambda \right)} = \lambda^{2} - \lambda$$
$$K_{2} = -33$$
Because
$$I_{2} = 0 \wedge I_{3} \neq 0$$
then by line type:
this equation is of type : parabola
$$I_{1} \tilde y^{2} + 2 \tilde x \sqrt{- \frac{I_{3}}{I_{1}}} = 0$$
or
$$6 \tilde x + \tilde y^{2} = 0$$
$$\tilde y^{2} = 6 \tilde x$$
- reduced to canonical form
$$- 6 x + y^{2} - 6 y - 15 = 0$$
This equation looks like:
$$a_{11} x^{2} + 2 a_{12} x y + 2 a_{13} x + a_{22} y^{2} + 2 a_{23} y + a_{33} = 0$$
where
$$a_{11} = 0$$
$$a_{12} = 0$$
$$a_{13} = -3$$
$$a_{22} = 1$$
$$a_{23} = -3$$
$$a_{33} = -15$$
The invariants of the equation when converting coordinates are determinants:
$$I_{1} = a_{11} + a_{22}$$
|a11 a12|
I2 = | |
|a12 a22|$$I_{3} = \left|\begin{matrix}a_{11} & a_{12} & a_{13}\\a_{12} & a_{22} & a_{23}\\a_{13} & a_{23} & a_{33}\end{matrix}\right|$$
$$I{\left(\lambda \right)} = \left|\begin{matrix}a_{11} - \lambda & a_{12}\\a_{12} & a_{22} - \lambda\end{matrix}\right|$$
|a11 a13| |a22 a23|
K2 = | | + | |
|a13 a33| |a23 a33|substitute coefficients
$$I_{1} = 1$$
|0 0|
I2 = | |
|0 1|$$I_{3} = \left|\begin{matrix}0 & 0 & -3\\0 & 1 & -3\\-3 & -3 & -15\end{matrix}\right|$$
$$I{\left(\lambda \right)} = \left|\begin{matrix}- \lambda & 0\\0 & 1 - \lambda\end{matrix}\right|$$
|0 -3 | |1 -3 |
K2 = | | + | |
|-3 -15| |-3 -15|$$I_{1} = 1$$
$$I_{2} = 0$$
$$I_{3} = -9$$
$$I{\left(\lambda \right)} = \lambda^{2} - \lambda$$
$$K_{2} = -33$$
Because
$$I_{2} = 0 \wedge I_{3} \neq 0$$
then by line type:
this equation is of type : parabola
$$I_{1} \tilde y^{2} + 2 \tilde x \sqrt{- \frac{I_{3}}{I_{1}}} = 0$$
or
$$6 \tilde x + \tilde y^{2} = 0$$
$$\tilde y^{2} = 6 \tilde x$$
- reduced to canonical form