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Simplifying -4x2 + 19x = -5x2 + -90 Reorder the terms: 19x + -4x2 = -5x2 + -90 Reorder the terms: 19x + -4x2 = -90 + -5x2 Solving 19x + -4x2 = -90 + -5x2 Solving for variable 'x'. Reorder the terms: 90 + 19x + -4x2 + 5x2 = -90 + -5x2 + 90 + 5x2 Combine like terms: -4x2 + 5x2 = 1x2 90 + 19x + 1x2 = -90 + -5x2 + 90 + 5x2 Reorder the terms: 90 + 19x + 1x2 = -90 + 90 + -5x2 + 5x2 Combine like terms: -90 + 90 = 0 90 + 19x + 1x2 = 0 + -5x2 + 5x2 90 + 19x + 1x2 = -5x2 + 5x2 Combine like terms: -5x2 + 5x2 = 0 90 + 19x + 1x2 = 0 Factor a trinomial. (10 + x)(9 + x) = 0Subproblem 1
Set the factor '(10 + x)' equal to zero and attempt to solve: Simplifying 10 + x = 0 Solving 10 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = 0 + -10 Combine like terms: 10 + -10 = 0 0 + x = 0 + -10 x = 0 + -10 Combine like terms: 0 + -10 = -10 x = -10 Simplifying x = -10Subproblem 2
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 = -9Solution
x = {-10, -9}
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