(9x-8)(7x+4)=0

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Solution for (9x-8)(7x+4)=0 equation:


Simplifying
(9x + -8)(7x + 4) = 0

Reorder the terms:
(-8 + 9x)(7x + 4) = 0

Reorder the terms:
(-8 + 9x)(4 + 7x) = 0

Multiply (-8 + 9x) * (4 + 7x)
(-8(4 + 7x) + 9x * (4 + 7x)) = 0
((4 * -8 + 7x * -8) + 9x * (4 + 7x)) = 0
((-32 + -56x) + 9x * (4 + 7x)) = 0
(-32 + -56x + (4 * 9x + 7x * 9x)) = 0
(-32 + -56x + (36x + 63x2)) = 0

Combine like terms: -56x + 36x = -20x
(-32 + -20x + 63x2) = 0

Solving
-32 + -20x + 63x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-4 + -7x)(8 + -9x) = 0

Subproblem 1

Set the factor '(-4 + -7x)' equal to zero and attempt to solve: Simplifying -4 + -7x = 0 Solving -4 + -7x = 0 Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + -7x = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -7x = 0 + 4 -7x = 0 + 4 Combine like terms: 0 + 4 = 4 -7x = 4 Divide each side by '-7'. x = -0.5714285714 Simplifying x = -0.5714285714

Subproblem 2

Set the factor '(8 + -9x)' equal to zero and attempt to solve: Simplifying 8 + -9x = 0 Solving 8 + -9x = 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 + -9x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -9x = 0 + -8 -9x = 0 + -8 Combine like terms: 0 + -8 = -8 -9x = -8 Divide each side by '-9'. x = 0.8888888889 Simplifying x = 0.8888888889

Solution

x = {-0.5714285714, 0.8888888889}

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