(9x-5)(8x+4)=0

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Solution for (9x-5)(8x+4)=0 equation:


Simplifying
(9x + -5)(8x + 4) = 0

Reorder the terms:
(-5 + 9x)(8x + 4) = 0

Reorder the terms:
(-5 + 9x)(4 + 8x) = 0

Multiply (-5 + 9x) * (4 + 8x)
(-5(4 + 8x) + 9x * (4 + 8x)) = 0
((4 * -5 + 8x * -5) + 9x * (4 + 8x)) = 0
((-20 + -40x) + 9x * (4 + 8x)) = 0
(-20 + -40x + (4 * 9x + 8x * 9x)) = 0
(-20 + -40x + (36x + 72x2)) = 0

Combine like terms: -40x + 36x = -4x
(-20 + -4x + 72x2) = 0

Solving
-20 + -4x + 72x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '4'.
4(-5 + -1x + 18x2) = 0

Factor a trinomial.
4((-1 + -2x)(5 + -9x)) = 0

Ignore the factor 4.

Subproblem 1

Set the factor '(-1 + -2x)' equal to zero and attempt to solve: Simplifying -1 + -2x = 0 Solving -1 + -2x = 0 Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + -2x = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -2x = 0 + 1 -2x = 0 + 1 Combine like terms: 0 + 1 = 1 -2x = 1 Divide each side by '-2'. x = -0.5 Simplifying x = -0.5

Subproblem 2

Set the factor '(5 + -9x)' equal to zero and attempt to solve: Simplifying 5 + -9x = 0 Solving 5 + -9x = 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 + -9x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -9x = 0 + -5 -9x = 0 + -5 Combine like terms: 0 + -5 = -5 -9x = -5 Divide each side by '-9'. x = 0.5555555556 Simplifying x = 0.5555555556

Solution

x = {-0.5, 0.5555555556}

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