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Simplifying (x + -6)(x + 6) = x2 + -36 Reorder the terms: (-6 + x)(x + 6) = x2 + -36 Reorder the terms: (-6 + x)(6 + x) = x2 + -36 Multiply (-6 + x) * (6 + x) (-6(6 + x) + x(6 + x)) = x2 + -36 ((6 * -6 + x * -6) + x(6 + x)) = x2 + -36 ((-36 + -6x) + x(6 + x)) = x2 + -36 (-36 + -6x + (6 * x + x * x)) = x2 + -36 (-36 + -6x + (6x + x2)) = x2 + -36 Combine like terms: -6x + 6x = 0 (-36 + 0 + x2) = x2 + -36 (-36 + x2) = x2 + -36 Reorder the terms: -36 + x2 = -36 + x2 Add '36' to each side of the equation. -36 + 36 + x2 = -36 + 36 + x2 Combine like terms: -36 + 36 = 0 0 + x2 = -36 + 36 + x2 x2 = -36 + 36 + x2 Combine like terms: -36 + 36 = 0 x2 = 0 + x2 x2 = x2 Add '-1x2' to each side of the equation. x2 + -1x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 0 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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