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Simplifying 2x2 + 7x = 15 * 15 Reorder the terms: 7x + 2x2 = 15 * 15 Multiply 15 * 15 7x + 2x2 = 225 Solving 7x + 2x2 = 225 Solving for variable 'x'. Reorder the terms: -225 + 7x + 2x2 = 225 + -225 Combine like terms: 225 + -225 = 0 -225 + 7x + 2x2 = 0 Factor a trinomial. (-25 + -2x)(9 + -1x) = 0Subproblem 1
Set the factor '(-25 + -2x)' equal to zero and attempt to solve: Simplifying -25 + -2x = 0 Solving -25 + -2x = 0 Move all terms containing x to the left, all other terms to the right. Add '25' to each side of the equation. -25 + 25 + -2x = 0 + 25 Combine like terms: -25 + 25 = 0 0 + -2x = 0 + 25 -2x = 0 + 25 Combine like terms: 0 + 25 = 25 -2x = 25 Divide each side by '-2'. x = -12.5 Simplifying x = -12.5Subproblem 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 = {-12.5, 9}
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