Mister Exam
Other calculators
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How to use it?
- Equation:
-
Equation x^2-8*x+15=0
-
Equation -x^2+4x+3=x^2-x-(1+2x^2)
-
Equation 3x+3=5x
-
Equation x^2+3x-4=0
- Express {x} in terms of y where:
- -17*x+2*y=9
- -13*x+7*y=-15
- -14*x-8*y=20
- -1*x+4*y=-10
- Graphing y =:
- 4-3*(3*x-8)
- -x
- Derivative of:
-
-x
- Integral of d{x}:
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-x
-
Identical expressions
- four - three *(three *x- eight)=-x
- 4 minus 3 multiply by (3 multiply by x minus 8) equally minus x
- four minus three multiply by (three multiply by x minus eight) equally minus x
- 4-3(3x-8)=-x
- 4-33x-8=-x
-
Similar expressions
- 4+3*(3*x-8)=-x
- 4-3*(3*x-8)=+x
- 4-3*(3*x+8)=-x
- 987-(x+364)=519
4-3*(3*x-8)=-x equation
The teacher will be very surprised to see your correct solution 😉
The solution
Detail solution
Given the linear equation:
Expand brackets in the left part
Looking for similar summands in the left part:
Move free summands (without x)
from left part to right part, we given:
$$- 9 x = - x - 28$$
Move the summands with the unknown x
from the right part to the left part:
$$\left(-8\right) x = -28$$
Divide both parts of the equation by -8
We get the answer: x = 7/2
4-3*(3*x-8) = -x
Expand brackets in the left part
4-3*3*x+3*8 = -x
Looking for similar summands in the left part:
28 - 9*x = -x
Move free summands (without x)
from left part to right part, we given:
$$- 9 x = - x - 28$$
Move the summands with the unknown x
from the right part to the left part:
$$\left(-8\right) x = -28$$
Divide both parts of the equation by -8
x = -28 / (-8)
We get the answer: x = 7/2
Sum and product of roots
[src]
sum
7/2
$$\frac{7}{2}$$
=
7/2
$$\frac{7}{2}$$
product
7/2
$$\frac{7}{2}$$
=
7/2
$$\frac{7}{2}$$
7/2