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Simplifying (7a2 + -3a) + -1(5a2 + -5a) = 0 Reorder the terms: (-3a + 7a2) + -1(5a2 + -5a) = 0 Remove parenthesis around (-3a + 7a2) -3a + 7a2 + -1(5a2 + -5a) = 0 Reorder the terms: -3a + 7a2 + -1(-5a + 5a2) = 0 -3a + 7a2 + (-5a * -1 + 5a2 * -1) = 0 -3a + 7a2 + (5a + -5a2) = 0 Reorder the terms: -3a + 5a + 7a2 + -5a2 = 0 Combine like terms: -3a + 5a = 2a 2a + 7a2 + -5a2 = 0 Combine like terms: 7a2 + -5a2 = 2a2 2a + 2a2 = 0 Solving 2a + 2a2 = 0 Solving for variable 'a'. Factor out the Greatest Common Factor (GCF), '2a'. 2a(1 + a) = 0 Ignore the factor 2.Subproblem 1
Set the factor 'a' equal to zero and attempt to solve: Simplifying a = 0 Solving a = 0 Move all terms containing a to the left, all other terms to the right. Simplifying a = 0Subproblem 2
Set the factor '(1 + a)' equal to zero and attempt to solve: Simplifying 1 + a = 0 Solving 1 + a = 0 Move all terms containing a to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + a = 0 + -1 Combine like terms: 1 + -1 = 0 0 + a = 0 + -1 a = 0 + -1 Combine like terms: 0 + -1 = -1 a = -1 Simplifying a = -1Solution
a = {0, -1}
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