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Simplifying (X + -7)(X + -3) = 0 Reorder the terms: (-7 + X)(X + -3) = 0 Reorder the terms: (-7 + X)(-3 + X) = 0 Multiply (-7 + X) * (-3 + X) (-7(-3 + X) + X(-3 + X)) = 0 ((-3 * -7 + X * -7) + X(-3 + X)) = 0 ((21 + -7X) + X(-3 + X)) = 0 (21 + -7X + (-3 * X + X * X)) = 0 (21 + -7X + (-3X + X2)) = 0 Combine like terms: -7X + -3X = -10X (21 + -10X + X2) = 0 Solving 21 + -10X + X2 = 0 Solving for variable 'X'. Factor a trinomial. (3 + -1X)(7 + -1X) = 0Subproblem 1
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 = 3Subproblem 2
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 = 7Solution
X = {3, 7}
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