-(x+8)(x-5)=0

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Solution for -(x+8)(x-5)=0 equation:


Simplifying
-1(x + 8)(x + -5) = 0

Reorder the terms:
-1(8 + x)(x + -5) = 0

Reorder the terms:
-1(8 + x)(-5 + x) = 0

Multiply (8 + x) * (-5 + x)
-1(8(-5 + x) + x(-5 + x)) = 0
-1((-5 * 8 + x * 8) + x(-5 + x)) = 0
-1((-40 + 8x) + x(-5 + x)) = 0
-1(-40 + 8x + (-5 * x + x * x)) = 0
-1(-40 + 8x + (-5x + x2)) = 0

Combine like terms: 8x + -5x = 3x
-1(-40 + 3x + x2) = 0
(-40 * -1 + 3x * -1 + x2 * -1) = 0
(40 + -3x + -1x2) = 0

Solving
40 + -3x + -1x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(5 + -1x)(8 + x) = 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 + x)' equal to zero and attempt to solve: Simplifying 8 + x = 0 Solving 8 + x = 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 + x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + x = 0 + -8 x = 0 + -8 Combine like terms: 0 + -8 = -8 x = -8 Simplifying x = -8

Solution

x = {5, -8}

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