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Simplifying 25x + -1(x2 + 12x + 36) = 0 Reorder the terms: 25x + -1(36 + 12x + x2) = 0 25x + (36 * -1 + 12x * -1 + x2 * -1) = 0 25x + (-36 + -12x + -1x2) = 0 Reorder the terms: -36 + 25x + -12x + -1x2 = 0 Combine like terms: 25x + -12x = 13x -36 + 13x + -1x2 = 0 Solving -36 + 13x + -1x2 = 0 Solving for variable 'x'. Factor a trinomial. (-9 + x)(4 + -1x) = 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 '(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 = {9, 4}
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