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Simplifying (x + 9)(x + 9) = 4 Reorder the terms: (9 + x)(x + 9) = 4 Reorder the terms: (9 + x)(9 + x) = 4 Multiply (9 + x) * (9 + x) (9(9 + x) + x(9 + x)) = 4 ((9 * 9 + x * 9) + x(9 + x)) = 4 ((81 + 9x) + x(9 + x)) = 4 (81 + 9x + (9 * x + x * x)) = 4 (81 + 9x + (9x + x2)) = 4 Combine like terms: 9x + 9x = 18x (81 + 18x + x2) = 4 Solving 81 + 18x + x2 = 4 Solving for variable 'x'. Reorder the terms: 81 + -4 + 18x + x2 = 4 + -4 Combine like terms: 81 + -4 = 77 77 + 18x + x2 = 4 + -4 Combine like terms: 4 + -4 = 0 77 + 18x + x2 = 0 Factor a trinomial. (11 + x)(7 + x) = 0Subproblem 1
Set the factor '(11 + x)' equal to zero and attempt to solve: Simplifying 11 + x = 0 Solving 11 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-11' to each side of the equation. 11 + -11 + x = 0 + -11 Combine like terms: 11 + -11 = 0 0 + x = 0 + -11 x = 0 + -11 Combine like terms: 0 + -11 = -11 x = -11 Simplifying x = -11Subproblem 2
Set the factor '(7 + x)' equal to zero and attempt to solve: Simplifying 7 + x = 0 Solving 7 + x = 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 + x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + x = 0 + -7 x = 0 + -7 Combine like terms: 0 + -7 = -7 x = -7 Simplifying x = -7Solution
x = {-11, -7}
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