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Simplifying 72a2 + -45ab + -27b2 = 0 Reorder the terms: -45ab + 72a2 + -27b2 = 0 Solving -45ab + 72a2 + -27b2 = 0 Solving for variable 'a'. Factor out the Greatest Common Factor (GCF), '9'. 9(-5ab + 8a2 + -3b2) = 0 Factor a trinomial. 9((a + -1b)(8a + 3b)) = 0 Ignore the factor 9.Subproblem 1
Set the factor '(a + -1b)' equal to zero and attempt to solve: Simplifying a + -1b = 0 Solving a + -1b = 0 Move all terms containing a to the left, all other terms to the right. Add 'b' to each side of the equation. a + -1b + b = 0 + b Combine like terms: -1b + b = 0 a + 0 = 0 + b a = 0 + b Remove the zero: a = b Simplifying a = bSubproblem 2
Set the factor '(8a + 3b)' equal to zero and attempt to solve: Simplifying 8a + 3b = 0 Solving 8a + 3b = 0 Move all terms containing a to the left, all other terms to the right. Add '-3b' to each side of the equation. 8a + 3b + -3b = 0 + -3b Combine like terms: 3b + -3b = 0 8a + 0 = 0 + -3b 8a = 0 + -3b Remove the zero: 8a = -3b Divide each side by '8'. a = -0.375b Simplifying a = -0.375bSolution
a = {b, -0.375b}
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