(7x-9)(8x+1)=0

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Solution for (7x-9)(8x+1)=0 equation:


Simplifying
(7x + -9)(8x + 1) = 0

Reorder the terms:
(-9 + 7x)(8x + 1) = 0

Reorder the terms:
(-9 + 7x)(1 + 8x) = 0

Multiply (-9 + 7x) * (1 + 8x)
(-9(1 + 8x) + 7x * (1 + 8x)) = 0
((1 * -9 + 8x * -9) + 7x * (1 + 8x)) = 0
((-9 + -72x) + 7x * (1 + 8x)) = 0
(-9 + -72x + (1 * 7x + 8x * 7x)) = 0
(-9 + -72x + (7x + 56x2)) = 0

Combine like terms: -72x + 7x = -65x
(-9 + -65x + 56x2) = 0

Solving
-9 + -65x + 56x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-1 + -8x)(9 + -7x) = 0

Subproblem 1

Set the factor '(-1 + -8x)' equal to zero and attempt to solve: Simplifying -1 + -8x = 0 Solving -1 + -8x = 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 + -8x = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -8x = 0 + 1 -8x = 0 + 1 Combine like terms: 0 + 1 = 1 -8x = 1 Divide each side by '-8'. x = -0.125 Simplifying x = -0.125

Subproblem 2

Set the factor '(9 + -7x)' equal to zero and attempt to solve: Simplifying 9 + -7x = 0 Solving 9 + -7x = 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 + -7x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -7x = 0 + -9 -7x = 0 + -9 Combine like terms: 0 + -9 = -9 -7x = -9 Divide each side by '-7'. x = 1.285714286 Simplifying x = 1.285714286

Solution

x = {-0.125, 1.285714286}

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