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