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

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


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

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

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

Multiply (-8 + 7x) * (9 + 8x)
(-8(9 + 8x) + 7x * (9 + 8x)) = 0
((9 * -8 + 8x * -8) + 7x * (9 + 8x)) = 0
((-72 + -64x) + 7x * (9 + 8x)) = 0
(-72 + -64x + (9 * 7x + 8x * 7x)) = 0
(-72 + -64x + (63x + 56x2)) = 0

Combine like terms: -64x + 63x = -1x
(-72 + -1x + 56x2) = 0

Solving
-72 + -1x + 56x2 = 0

Solving for variable 'x'.

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

Subproblem 1

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

Subproblem 2

Set the factor '(8 + -7x)' equal to zero and attempt to solve: Simplifying 8 + -7x = 0 Solving 8 + -7x = 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 + -7x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -7x = 0 + -8 -7x = 0 + -8 Combine like terms: 0 + -8 = -8 -7x = -8 Divide each side by '-7'. x = 1.142857143 Simplifying x = 1.142857143

Solution

x = {-1.125, 1.142857143}

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