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Simplifying 2x2 = 72 + -7x Solving 2x2 = 72 + -7x Solving for variable 'x'. Reorder the terms: -72 + 7x + 2x2 = 72 + -7x + -72 + 7x Reorder the terms: -72 + 7x + 2x2 = 72 + -72 + -7x + 7x Combine like terms: 72 + -72 = 0 -72 + 7x + 2x2 = 0 + -7x + 7x -72 + 7x + 2x2 = -7x + 7x Combine like terms: -7x + 7x = 0 -72 + 7x + 2x2 = 0 Factor a trinomial. (-8 + -1x)(9 + -2x) = 0Subproblem 1
Set the factor '(-8 + -1x)' equal to zero and attempt to solve: Simplifying -8 + -1x = 0 Solving -8 + -1x = 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 + -1x = 0 + 8 Combine like terms: -8 + 8 = 0 0 + -1x = 0 + 8 -1x = 0 + 8 Combine like terms: 0 + 8 = 8 -1x = 8 Divide each side by '-1'. x = -8 Simplifying x = -8Subproblem 2
Set the factor '(9 + -2x)' equal to zero and attempt to solve: Simplifying 9 + -2x = 0 Solving 9 + -2x = 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 + -2x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -2x = 0 + -9 -2x = 0 + -9 Combine like terms: 0 + -9 = -9 -2x = -9 Divide each side by '-2'. x = 4.5 Simplifying x = 4.5Solution
x = {-8, 4.5}
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