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Simplifying 4x2 + 80x = -400 Reorder the terms: 80x + 4x2 = -400 Solving 80x + 4x2 = -400 Solving for variable 'x'. Reorder the terms: 400 + 80x + 4x2 = -400 + 400 Combine like terms: -400 + 400 = 0 400 + 80x + 4x2 = 0 Factor out the Greatest Common Factor (GCF), '4'. 4(100 + 20x + x2) = 0 Factor a trinomial. 4((10 + x)(10 + x)) = 0 Ignore the factor 4.Subproblem 1
Set the factor '(10 + x)' equal to zero and attempt to solve: Simplifying 10 + x = 0 Solving 10 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = 0 + -10 Combine like terms: 10 + -10 = 0 0 + x = 0 + -10 x = 0 + -10 Combine like terms: 0 + -10 = -10 x = -10 Simplifying x = -10Subproblem 2
Set the factor '(10 + x)' equal to zero and attempt to solve: Simplifying 10 + x = 0 Solving 10 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = 0 + -10 Combine like terms: 10 + -10 = 0 0 + x = 0 + -10 x = 0 + -10 Combine like terms: 0 + -10 = -10 x = -10 Simplifying x = -10Solution
x = {-10, -10}
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