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Simplifying 9 = 7x2 + -2x Reorder the terms: 9 = -2x + 7x2 Solving 9 = -2x + 7x2 Solving for variable 'x'. Reorder the terms: 9 + 2x + -7x2 = -2x + 2x + 7x2 + -7x2 Combine like terms: -2x + 2x = 0 9 + 2x + -7x2 = 0 + 7x2 + -7x2 9 + 2x + -7x2 = 7x2 + -7x2 Combine like terms: 7x2 + -7x2 = 0 9 + 2x + -7x2 = 0 Factor a trinomial. (9 + -7x)(1 + x) = 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 '(1 + x)' equal to zero and attempt to solve: Simplifying 1 + x = 0 Solving 1 + x = 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 + x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + x = 0 + -1 x = 0 + -1 Combine like terms: 0 + -1 = -1 x = -1 Simplifying x = -1Solution
x = {1.285714286, -1}
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