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Simplifying -4 = x2 + 2x + -7 Reorder the terms: -4 = -7 + 2x + x2 Solving -4 = -7 + 2x + x2 Solving for variable 'x'. Combine like terms: -4 + 7 = 3 3 + -2x + -1x2 = -7 + 2x + x2 + 7 + -2x + -1x2 Reorder the terms: 3 + -2x + -1x2 = -7 + 7 + 2x + -2x + x2 + -1x2 Combine like terms: -7 + 7 = 0 3 + -2x + -1x2 = 0 + 2x + -2x + x2 + -1x2 3 + -2x + -1x2 = 2x + -2x + x2 + -1x2 Combine like terms: 2x + -2x = 0 3 + -2x + -1x2 = 0 + x2 + -1x2 3 + -2x + -1x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 3 + -2x + -1x2 = 0 Factor a trinomial. (1 + -1x)(3 + x) = 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 '(3 + x)' equal to zero and attempt to solve: Simplifying 3 + x = 0 Solving 3 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + x = 0 + -3 x = 0 + -3 Combine like terms: 0 + -3 = -3 x = -3 Simplifying x = -3Solution
x = {1, -3}
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