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Simplifying (2a + 8b)(4a + -2b) = 0 Multiply (2a + 8b) * (4a + -2b) (2a * (4a + -2b) + 8b * (4a + -2b)) = 0 ((4a * 2a + -2b * 2a) + 8b * (4a + -2b)) = 0 Reorder the terms: ((-4ab + 8a2) + 8b * (4a + -2b)) = 0 ((-4ab + 8a2) + 8b * (4a + -2b)) = 0 (-4ab + 8a2 + (4a * 8b + -2b * 8b)) = 0 (-4ab + 8a2 + (32ab + -16b2)) = 0 Reorder the terms: (-4ab + 32ab + 8a2 + -16b2) = 0 Combine like terms: -4ab + 32ab = 28ab (28ab + 8a2 + -16b2) = 0 Solving 28ab + 8a2 + -16b2 = 0 Solving for variable 'a'. Factor out the Greatest Common Factor (GCF), '4'. 4(7ab + 2a2 + -4b2) = 0 Factor a trinomial. 4((2a + -1b)(a + 4b)) = 0 Ignore the factor 4.Subproblem 1
Set the factor '(2a + -1b)' equal to zero and attempt to solve: Simplifying 2a + -1b = 0 Solving 2a + -1b = 0 Move all terms containing a to the left, all other terms to the right. Add 'b' to each side of the equation. 2a + -1b + b = 0 + b Combine like terms: -1b + b = 0 2a + 0 = 0 + b 2a = 0 + b Remove the zero: 2a = b Divide each side by '2'. a = 0.5b Simplifying a = 0.5bSubproblem 2
Set the factor '(a + 4b)' equal to zero and attempt to solve: Simplifying a + 4b = 0 Solving a + 4b = 0 Move all terms containing a to the left, all other terms to the right. Add '-4b' to each side of the equation. a + 4b + -4b = 0 + -4b Combine like terms: 4b + -4b = 0 a + 0 = 0 + -4b a = 0 + -4b Remove the zero: a = -4b Simplifying a = -4bSolution
a = {0.5b, -4b}
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