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Simplifying x2 = 7(2x + -7) Reorder the terms: x2 = 7(-7 + 2x) x2 = (-7 * 7 + 2x * 7) x2 = (-49 + 14x) Solving x2 = -49 + 14x Solving for variable 'x'. Reorder the terms: 49 + -14x + x2 = -49 + 14x + 49 + -14x Reorder the terms: 49 + -14x + x2 = -49 + 49 + 14x + -14x Combine like terms: -49 + 49 = 0 49 + -14x + x2 = 0 + 14x + -14x 49 + -14x + x2 = 14x + -14x Combine like terms: 14x + -14x = 0 49 + -14x + x2 = 0 Factor a trinomial. (7 + -1x)(7 + -1x) = 0Subproblem 1
Set the factor '(7 + -1x)' equal to zero and attempt to solve: Simplifying 7 + -1x = 0 Solving 7 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1x = 0 + -7 -1x = 0 + -7 Combine like terms: 0 + -7 = -7 -1x = -7 Divide each side by '-1'. x = 7 Simplifying x = 7Subproblem 2
Set the factor '(7 + -1x)' equal to zero and attempt to solve: Simplifying 7 + -1x = 0 Solving 7 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1x = 0 + -7 -1x = 0 + -7 Combine like terms: 0 + -7 = -7 -1x = -7 Divide each side by '-1'. x = 7 Simplifying x = 7Solution
x = {7, 7}
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