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Simplifying X(X + 7) = 30 Reorder the terms: X(7 + X) = 30 (7 * X + X * X) = 30 (7X + X2) = 30 Solving 7X + X2 = 30 Solving for variable 'X'. Reorder the terms: -30 + 7X + X2 = 30 + -30 Combine like terms: 30 + -30 = 0 -30 + 7X + X2 = 0 Factor a trinomial. (-10 + -1X)(3 + -1X) = 0Subproblem 1
Set the factor '(-10 + -1X)' equal to zero and attempt to solve: Simplifying -10 + -1X = 0 Solving -10 + -1X = 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 + -1X = 0 + 10 Combine like terms: -10 + 10 = 0 0 + -1X = 0 + 10 -1X = 0 + 10 Combine like terms: 0 + 10 = 10 -1X = 10 Divide each side by '-1'. X = -10 Simplifying X = -10Subproblem 2
Set the factor '(3 + -1X)' equal to zero and attempt to solve: Simplifying 3 + -1X = 0 Solving 3 + -1X = 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 + -1X = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1X = 0 + -3 -1X = 0 + -3 Combine like terms: 0 + -3 = -3 -1X = -3 Divide each side by '-1'. X = 3 Simplifying X = 3Solution
X = {-10, 3}
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