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Simplifying 2x2 + 25x + 78 = 15 Reorder the terms: 78 + 25x + 2x2 = 15 Solving 78 + 25x + 2x2 = 15 Solving for variable 'x'. Reorder the terms: 78 + -15 + 25x + 2x2 = 15 + -15 Combine like terms: 78 + -15 = 63 63 + 25x + 2x2 = 15 + -15 Combine like terms: 15 + -15 = 0 63 + 25x + 2x2 = 0 Factor a trinomial. (9 + x)(7 + 2x) = 0Subproblem 1
Set the factor '(9 + x)' equal to zero and attempt to solve: Simplifying 9 + x = 0 Solving 9 + x = 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 + x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + x = 0 + -9 x = 0 + -9 Combine like terms: 0 + -9 = -9 x = -9 Simplifying x = -9Subproblem 2
Set the factor '(7 + 2x)' equal to zero and attempt to solve: Simplifying 7 + 2x = 0 Solving 7 + 2x = 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 + 2x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 2x = 0 + -7 2x = 0 + -7 Combine like terms: 0 + -7 = -7 2x = -7 Divide each side by '2'. x = -3.5 Simplifying x = -3.5Solution
x = {-9, -3.5}
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