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Simplifying (3 + x)(7 + -1x) = 0 Multiply (3 + x) * (7 + -1x) (3(7 + -1x) + x(7 + -1x)) = 0 ((7 * 3 + -1x * 3) + x(7 + -1x)) = 0 ((21 + -3x) + x(7 + -1x)) = 0 (21 + -3x + (7 * x + -1x * x)) = 0 (21 + -3x + (7x + -1x2)) = 0 Combine like terms: -3x + 7x = 4x (21 + 4x + -1x2) = 0 Solving 21 + 4x + -1x2 = 0 Solving for variable 'x'. Factor a trinomial. (7 + -1x)(3 + x) = 0Subproblem 1
Set the factor '(7 + -1x)' equal to zero and attempt to solve: Simplifying 7 + -1x = 0 Solving 7 + -1x = 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 + -1x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1x = 0 + -7 -1x = 0 + -7 Combine like terms: 0 + -7 = -7 -1x = -7 Divide each side by '-1'. x = 7 Simplifying x = 7Subproblem 2
Set the factor '(3 + x)' equal to zero and attempt to solve: Simplifying 3 + x = 0 Solving 3 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + x = 0 + -3 x = 0 + -3 Combine like terms: 0 + -3 = -3 x = -3 Simplifying x = -3Solution
x = {7, -3}
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