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Simplifying (x + -1)(x + 7) = 0 Reorder the terms: (-1 + x)(x + 7) = 0 Reorder the terms: (-1 + x)(7 + x) = 0 Multiply (-1 + x) * (7 + x) (-1(7 + x) + x(7 + x)) = 0 ((7 * -1 + x * -1) + x(7 + x)) = 0 ((-7 + -1x) + x(7 + x)) = 0 (-7 + -1x + (7 * x + x * x)) = 0 (-7 + -1x + (7x + x2)) = 0 Combine like terms: -1x + 7x = 6x (-7 + 6x + x2) = 0 Solving -7 + 6x + x2 = 0 Solving for variable 'x'. Factor a trinomial. (-7 + -1x)(1 + -1x) = 0Subproblem 1
Set the factor '(-7 + -1x)' equal to zero and attempt to solve: Simplifying -7 + -1x = 0 Solving -7 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -1x = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -1x = 0 + 7 -1x = 0 + 7 Combine like terms: 0 + 7 = 7 -1x = 7 Divide each side by '-1'. x = -7 Simplifying x = -7Subproblem 2
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 = 1Solution
x = {-7, 1}
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