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Simplifying (x + 3)(x + -5) = 9 Reorder the terms: (3 + x)(x + -5) = 9 Reorder the terms: (3 + x)(-5 + x) = 9 Multiply (3 + x) * (-5 + x) (3(-5 + x) + x(-5 + x)) = 9 ((-5 * 3 + x * 3) + x(-5 + x)) = 9 ((-15 + 3x) + x(-5 + x)) = 9 (-15 + 3x + (-5 * x + x * x)) = 9 (-15 + 3x + (-5x + x2)) = 9 Combine like terms: 3x + -5x = -2x (-15 + -2x + x2) = 9 Solving -15 + -2x + x2 = 9 Solving for variable 'x'. Reorder the terms: -15 + -9 + -2x + x2 = 9 + -9 Combine like terms: -15 + -9 = -24 -24 + -2x + x2 = 9 + -9 Combine like terms: 9 + -9 = 0 -24 + -2x + x2 = 0 Factor a trinomial. (-4 + -1x)(6 + -1x) = 0Subproblem 1
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 = -4Subproblem 2
Set the factor '(6 + -1x)' equal to zero and attempt to solve: Simplifying 6 + -1x = 0 Solving 6 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + -1x = 0 + -6 Combine like terms: 6 + -6 = 0 0 + -1x = 0 + -6 -1x = 0 + -6 Combine like terms: 0 + -6 = -6 -1x = -6 Divide each side by '-1'. x = 6 Simplifying x = 6Solution
x = {-4, 6}
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