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Simplifying (7x + -8)(7x + 9) = 0 Reorder the terms: (-8 + 7x)(7x + 9) = 0 Reorder the terms: (-8 + 7x)(9 + 7x) = 0 Multiply (-8 + 7x) * (9 + 7x) (-8(9 + 7x) + 7x * (9 + 7x)) = 0 ((9 * -8 + 7x * -8) + 7x * (9 + 7x)) = 0 ((-72 + -56x) + 7x * (9 + 7x)) = 0 (-72 + -56x + (9 * 7x + 7x * 7x)) = 0 (-72 + -56x + (63x + 49x2)) = 0 Combine like terms: -56x + 63x = 7x (-72 + 7x + 49x2) = 0 Solving -72 + 7x + 49x2 = 0 Solving for variable 'x'. Factor a trinomial. (-9 + -7x)(8 + -7x) = 0Subproblem 1
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 = -1.285714286Subproblem 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 = 1.142857143Solution
x = {-1.285714286, 1.142857143}
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