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

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


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

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

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

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

Combine like terms: -63x + 32x = -31x
(-36 + -31x + 56x2) = 0

Solving
-36 + -31x + 56x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-4 + -7x)(9 + -8x) = 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 '(9 + -8x)' equal to zero and attempt to solve: Simplifying 9 + -8x = 0 Solving 9 + -8x = 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 + -8x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -8x = 0 + -9 -8x = 0 + -9 Combine like terms: 0 + -9 = -9 -8x = -9 Divide each side by '-8'. x = 1.125 Simplifying x = 1.125

Solution

x = {-0.5714285714, 1.125}

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