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Simplifying 4x2 + -38 = 5x2 + 21x Reorder the terms: -38 + 4x2 = 5x2 + 21x Reorder the terms: -38 + 4x2 = 21x + 5x2 Solving -38 + 4x2 = 21x + 5x2 Solving for variable 'x'. Reorder the terms: -38 + -21x + 4x2 + -5x2 = 21x + 5x2 + -21x + -5x2 Combine like terms: 4x2 + -5x2 = -1x2 -38 + -21x + -1x2 = 21x + 5x2 + -21x + -5x2 Reorder the terms: -38 + -21x + -1x2 = 21x + -21x + 5x2 + -5x2 Combine like terms: 21x + -21x = 0 -38 + -21x + -1x2 = 0 + 5x2 + -5x2 -38 + -21x + -1x2 = 5x2 + -5x2 Combine like terms: 5x2 + -5x2 = 0 -38 + -21x + -1x2 = 0 Factor out the Greatest Common Factor (GCF), '-1'. -1(38 + 21x + x2) = 0 Factor a trinomial. -1((19 + x)(2 + x)) = 0 Ignore the factor -1.Subproblem 1
Set the factor '(19 + x)' equal to zero and attempt to solve: Simplifying 19 + x = 0 Solving 19 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-19' to each side of the equation. 19 + -19 + x = 0 + -19 Combine like terms: 19 + -19 = 0 0 + x = 0 + -19 x = 0 + -19 Combine like terms: 0 + -19 = -19 x = -19 Simplifying x = -19Subproblem 2
Set the factor '(2 + x)' equal to zero and attempt to solve: Simplifying 2 + x = 0 Solving 2 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + x = 0 + -2 x = 0 + -2 Combine like terms: 0 + -2 = -2 x = -2 Simplifying x = -2Solution
x = {-19, -2}
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