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Simplifying x2 + x2 + 4x + 4 = x2 + 8x + 16 + -7 Reorder the terms: 4 + 4x + x2 + x2 = x2 + 8x + 16 + -7 Combine like terms: x2 + x2 = 2x2 4 + 4x + 2x2 = x2 + 8x + 16 + -7 Reorder the terms: 4 + 4x + 2x2 = 16 + -7 + 8x + x2 Combine like terms: 16 + -7 = 9 4 + 4x + 2x2 = 9 + 8x + x2 Solving 4 + 4x + 2x2 = 9 + 8x + x2 Solving for variable 'x'. Reorder the terms: 4 + -9 + 4x + -8x + 2x2 + -1x2 = 9 + 8x + x2 + -9 + -8x + -1x2 Combine like terms: 4 + -9 = -5 -5 + 4x + -8x + 2x2 + -1x2 = 9 + 8x + x2 + -9 + -8x + -1x2 Combine like terms: 4x + -8x = -4x -5 + -4x + 2x2 + -1x2 = 9 + 8x + x2 + -9 + -8x + -1x2 Combine like terms: 2x2 + -1x2 = 1x2 -5 + -4x + 1x2 = 9 + 8x + x2 + -9 + -8x + -1x2 Reorder the terms: -5 + -4x + 1x2 = 9 + -9 + 8x + -8x + x2 + -1x2 Combine like terms: 9 + -9 = 0 -5 + -4x + 1x2 = 0 + 8x + -8x + x2 + -1x2 -5 + -4x + 1x2 = 8x + -8x + x2 + -1x2 Combine like terms: 8x + -8x = 0 -5 + -4x + 1x2 = 0 + x2 + -1x2 -5 + -4x + 1x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -5 + -4x + 1x2 = 0 Factor a trinomial. (-1 + -1x)(5 + -1x) = 0Subproblem 1
Set the factor '(-1 + -1x)' equal to zero and attempt to solve: Simplifying -1 + -1x = 0 Solving -1 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + -1x = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -1x = 0 + 1 -1x = 0 + 1 Combine like terms: 0 + 1 = 1 -1x = 1 Divide each side by '-1'. x = -1 Simplifying x = -1Subproblem 2
Set the factor '(5 + -1x)' equal to zero and attempt to solve: Simplifying 5 + -1x = 0 Solving 5 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -1x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1x = 0 + -5 -1x = 0 + -5 Combine like terms: 0 + -5 = -5 -1x = -5 Divide each side by '-1'. x = 5 Simplifying x = 5Solution
x = {-1, 5}
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