Mister Exam
Other calculators
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How to use it?
- Equation:
-
Equation x^2=11
-
Equation sin(x^2)=0
-
Equation cos(x)=-3/4
-
Equation 13-6(3-x)=25
- Express {x} in terms of y where:
- -16*x+7*y=-5
- (x^2+y^2-1)^3-x^2*y^3=0
- -2*x+1*y=-8
- -2*x-1*y=-8
- Graphing y =:
- x^2
- Derivative of:
-
x^2
- 11
- Integral of d{x}:
-
x^2
-
11
- Sum of series:
-
11
-
Identical expressions
- x^ two = eleven
- x squared equally 11
- x to the power of two equally eleven
- x2=11
- x²=11
- x to the power of 2=11
-
Similar expressions
- 2x^2-5x-7=0
- x^2+x+lg(sinx)=1+lg(sinx)
- √(x^2-1)=2*x
- sqrt(x^3-4*x^2-10*x+29)=3-x
x^2=11 equation
The teacher will be very surprised to see your correct solution 😉
The solution
Detail solution
Move right part of the equation to
left part with negative sign.
The equation is transformed from
$$x^{2} = 11$$
to
$$x^{2} - 11 = 0$$
This equation is of the form
A quadratic equation can be solved
using the discriminant.
The roots of the quadratic equation:
$$x_{1} = \frac{\sqrt{D} - b}{2 a}$$
$$x_{2} = \frac{- \sqrt{D} - b}{2 a}$$
where D = b^2 - 4*a*c - it is the discriminant.
Because
$$a = 1$$
$$b = 0$$
$$c = -11$$
, then
Because D > 0, then the equation has two roots.
or
$$x_{1} = \sqrt{11}$$
$$x_{2} = - \sqrt{11}$$
left part with negative sign.
The equation is transformed from
$$x^{2} = 11$$
to
$$x^{2} - 11 = 0$$
This equation is of the form
a*x^2 + b*x + c = 0
A quadratic equation can be solved
using the discriminant.
The roots of the quadratic equation:
$$x_{1} = \frac{\sqrt{D} - b}{2 a}$$
$$x_{2} = \frac{- \sqrt{D} - b}{2 a}$$
where D = b^2 - 4*a*c - it is the discriminant.
Because
$$a = 1$$
$$b = 0$$
$$c = -11$$
, then
D = b^2 - 4 * a * c =
(0)^2 - 4 * (1) * (-11) = 44
Because D > 0, then the equation has two roots.
x1 = (-b + sqrt(D)) / (2*a)
x2 = (-b - sqrt(D)) / (2*a)
or
$$x_{1} = \sqrt{11}$$
$$x_{2} = - \sqrt{11}$$
Vieta's Theorem
it is reduced quadratic equation
$$p x + q + x^{2} = 0$$
where
$$p = \frac{b}{a}$$
$$p = 0$$
$$q = \frac{c}{a}$$
$$q = -11$$
Vieta Formulas
$$x_{1} + x_{2} = - p$$
$$x_{1} x_{2} = q$$
$$x_{1} + x_{2} = 0$$
$$x_{1} x_{2} = -11$$
$$p x + q + x^{2} = 0$$
where
$$p = \frac{b}{a}$$
$$p = 0$$
$$q = \frac{c}{a}$$
$$q = -11$$
Vieta Formulas
$$x_{1} + x_{2} = - p$$
$$x_{1} x_{2} = q$$
$$x_{1} + x_{2} = 0$$
$$x_{1} x_{2} = -11$$
Sum and product of roots
[src]
sum
____ ____ - \/ 11 + \/ 11
$$- \sqrt{11} + \sqrt{11}$$
=
0
$$0$$
product
____ ____ -\/ 11 *\/ 11
$$- \sqrt{11} \sqrt{11}$$
=
-11
$$-11$$
-11
Rapid solution
[src]
____ x1 = -\/ 11
$$x_{1} = - \sqrt{11}$$
____ x2 = \/ 11
$$x_{2} = \sqrt{11}$$
x2 = sqrt(11)
The graph