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Simplifying x(4x + 3) = 280 Reorder the terms: x(3 + 4x) = 280 (3 * x + 4x * x) = 280 (3x + 4x2) = 280 Solving 3x + 4x2 = 280 Solving for variable 'x'. Reorder the terms: -280 + 3x + 4x2 = 280 + -280 Combine like terms: 280 + -280 = 0 -280 + 3x + 4x2 = 0 Factor a trinomial. (-35 + -4x)(8 + -1x) = 0Subproblem 1
Set the factor '(-35 + -4x)' equal to zero and attempt to solve: Simplifying -35 + -4x = 0 Solving -35 + -4x = 0 Move all terms containing x to the left, all other terms to the right. Add '35' to each side of the equation. -35 + 35 + -4x = 0 + 35 Combine like terms: -35 + 35 = 0 0 + -4x = 0 + 35 -4x = 0 + 35 Combine like terms: 0 + 35 = 35 -4x = 35 Divide each side by '-4'. x = -8.75 Simplifying x = -8.75Subproblem 2
Set the factor '(8 + -1x)' equal to zero and attempt to solve: Simplifying 8 + -1x = 0 Solving 8 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -1x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1x = 0 + -8 -1x = 0 + -8 Combine like terms: 0 + -8 = -8 -1x = -8 Divide each side by '-1'. x = 8 Simplifying x = 8Solution
x = {-8.75, 8}
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