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