(2x-5)(x+8)=0

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Solution for (2x-5)(x+8)=0 equation: 


Simplifying
(2x + -5)(x + 8) = 0

Reorder the terms:
(-5 + 2x)(x + 8) = 0

Reorder the terms:
(-5 + 2x)(8 + x) = 0

Multiply (-5 + 2x) * (8 + x)
(-5(8 + x) + 2x * (8 + x)) = 0
((8 * -5 + x * -5) + 2x * (8 + x)) = 0
((-40 + -5x) + 2x * (8 + x)) = 0
(-40 + -5x + (8 * 2x + x * 2x)) = 0
(-40 + -5x + (16x + 2x2)) = 0

Combine like terms: -5x + 16x = 11x
(-40 + 11x + 2x2) = 0

Solving
-40 + 11x + 2x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-8 + -1x)(5 + -2x) = 0


Subproblem 1
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

Subproblem 2
Set the factor '(5 + -2x)' equal to zero and attempt to solve:

Simplifying
5 + -2x = 0

Solving
5 + -2x = 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 + -2x = 0 + -5

Combine like terms: 5 + -5 = 0
0 + -2x = 0 + -5
-2x = 0 + -5

Combine like terms: 0 + -5 = -5
-2x = -5

Divide each side by '-2'.
x = 2.5

Simplifying
x = 2.5
Solution
x = {-8, 2.5}

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