(x-8)(5x+9)=0

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Solution for (x-8)(5x+9)=0 equation:


Simplifying
(x + -8)(5x + 9) = 0

Reorder the terms:
(-8 + x)(5x + 9) = 0

Reorder the terms:
(-8 + x)(9 + 5x) = 0

Multiply (-8 + x) * (9 + 5x)
(-8(9 + 5x) + x(9 + 5x)) = 0
((9 * -8 + 5x * -8) + x(9 + 5x)) = 0
((-72 + -40x) + x(9 + 5x)) = 0
(-72 + -40x + (9 * x + 5x * x)) = 0
(-72 + -40x + (9x + 5x2)) = 0

Combine like terms: -40x + 9x = -31x
(-72 + -31x + 5x2) = 0

Solving
-72 + -31x + 5x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-9 + -5x)(8 + -1x) = 0

Subproblem 1

Set the factor '(-9 + -5x)' equal to zero and attempt to solve: Simplifying -9 + -5x = 0 Solving -9 + -5x = 0 Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + -5x = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -5x = 0 + 9 -5x = 0 + 9 Combine like terms: 0 + 9 = 9 -5x = 9 Divide each side by '-5'. x = -1.8 Simplifying x = -1.8

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 = {-1.8, 8}

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