x^2-3x-40=0

Simple and best practice solution for x^2-3x-40=0 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for x^2-3x-40=0 equation: 


Simplifying
x2 + -3x + -40 = 0

Reorder the terms:
-40 + -3x + x2 = 0

Solving
-40 + -3x + x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-5 + -1x)(8 + -1x) = 0


Subproblem 1
Set the factor '(-5 + -1x)' equal to zero and attempt to solve:

Simplifying
-5 + -1x = 0

Solving
-5 + -1x = 0

Move all terms containing x to the left, all other terms to the right.

Add '5' to each side of the equation.
-5 + 5 + -1x = 0 + 5

Combine like terms: -5 + 5 = 0
0 + -1x = 0 + 5
-1x = 0 + 5

Combine like terms: 0 + 5 = 5
-1x = 5

Divide each side by '-1'.
x = -5

Simplifying
x = -5

Subproblem 2
Set the factor '(8 + -1x)' equal to zero and attempt to solve:

Simplifying
8 + -1x = 0

Solving
8 + -1x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-8' to each side of the equation.
8 + -8 + -1x = 0 + -8

Combine like terms: 8 + -8 = 0
0 + -1x = 0 + -8
-1x = 0 + -8

Combine like terms: 0 + -8 = -8
-1x = -8

Divide each side by '-1'.
x = 8

Simplifying
x = 8
Solution
x = {-5, 8}

See similar equations:

| 4-x^5=18 | | S=2x^2-12x+86 | | x^2+2x+2=0 | | (4x^2-6)=(-2x^2+19x) | | 20=-4x^2+4x+15 | | (X-11)(x^2+7x-8)= | | K^3-12=-15 | | Y^2+4=6 | | X^2-4=16 | | 5p+4p^2=-1 | | 4=36x^2 | | 0=-x^2-11x-30 | | 0=2x^2-25x+12 | | 25X^2-20X=-4 | | -8X+16X^2=-1 | | 16-8X+X^2=0 | | 9X^2-6X+1=0 | | 4X^2-16=-16 | | 25-10X+X^2=0 | | -12X+4=-9X^2 | | 36-12X+X^2=0 | | X^2-16X+64=0 | | 5X^2-2X-3=0 | | 4Y^2=-4Y-1 | | 3X^2-2=X^2+6 | | X^2=8X | | Y^2=-7Y-10 | | X^2-3X-10=0 | | Y^2=49 | | 23P=5P^2+24 | | U^3=14U^2+32U | | 3Y^2+2Y-1=0 |

Equations solver categories