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Simplifying (7x + -2)(x + -9) = 0 Reorder the terms: (-2 + 7x)(x + -9) = 0 Reorder the terms: (-2 + 7x)(-9 + x) = 0 Multiply (-2 + 7x) * (-9 + x) (-2(-9 + x) + 7x * (-9 + x)) = 0 ((-9 * -2 + x * -2) + 7x * (-9 + x)) = 0 ((18 + -2x) + 7x * (-9 + x)) = 0 (18 + -2x + (-9 * 7x + x * 7x)) = 0 (18 + -2x + (-63x + 7x2)) = 0 Combine like terms: -2x + -63x = -65x (18 + -65x + 7x2) = 0 Solving 18 + -65x + 7x2 = 0 Solving for variable 'x'. Factor a trinomial. (2 + -7x)(9 + -1x) = 0Subproblem 1
Set the factor '(2 + -7x)' equal to zero and attempt to solve: Simplifying 2 + -7x = 0 Solving 2 + -7x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -7x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -7x = 0 + -2 -7x = 0 + -2 Combine like terms: 0 + -2 = -2 -7x = -2 Divide each side by '-7'. x = 0.2857142857 Simplifying x = 0.2857142857Subproblem 2
Set the factor '(9 + -1x)' equal to zero and attempt to solve: Simplifying 9 + -1x = 0 Solving 9 + -1x = 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 + -1x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1x = 0 + -9 -1x = 0 + -9 Combine like terms: 0 + -9 = -9 -1x = -9 Divide each side by '-1'. x = 9 Simplifying x = 9Solution
x = {0.2857142857, 9}
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