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Simplifying (x + -4x)(5x + -4x) = 56 Combine like terms: x + -4x = -3x (-3x)(5x + -4x) = 56 Remove parenthesis around (-3x) -3x(5x + -4x) = 56 Combine like terms: 5x + -4x = 1x -3x(1x) = 56 Remove parenthesis around (1x) -3x * 1x = 56 Reorder the terms for easier multiplication: -3 * 1x * x = 56 Multiply -3 * 1 -3x * x = 56 Multiply x * x -3x2 = 56 Solving -3x2 = 56 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Divide each side by '-3'. x2 = -18.66666667 Simplifying x2 = -18.66666667 Reorder the terms: 18.66666667 + x2 = -18.66666667 + 18.66666667 Combine like terms: -18.66666667 + 18.66666667 = 0.00000000 18.66666667 + x2 = 0.00000000 The solution to this equation could not be determined.
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