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Simplifying 5x2 + 12x = 128 Reorder the terms: 12x + 5x2 = 128 Solving 12x + 5x2 = 128 Solving for variable 'x'. Reorder the terms: -128 + 12x + 5x2 = 128 + -128 Combine like terms: 128 + -128 = 0 -128 + 12x + 5x2 = 0 Factor a trinomial. (-32 + -5x)(4 + -1x) = 0Subproblem 1
Set the factor '(-32 + -5x)' equal to zero and attempt to solve: Simplifying -32 + -5x = 0 Solving -32 + -5x = 0 Move all terms containing x to the left, all other terms to the right. Add '32' to each side of the equation. -32 + 32 + -5x = 0 + 32 Combine like terms: -32 + 32 = 0 0 + -5x = 0 + 32 -5x = 0 + 32 Combine like terms: 0 + 32 = 32 -5x = 32 Divide each side by '-5'. x = -6.4 Simplifying x = -6.4Subproblem 2
Set the factor '(4 + -1x)' equal to zero and attempt to solve: Simplifying 4 + -1x = 0 Solving 4 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1x = 0 + -4 -1x = 0 + -4 Combine like terms: 0 + -4 = -4 -1x = -4 Divide each side by '-1'. x = 4 Simplifying x = 4Solution
x = {-6.4, 4}
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