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Simplifying 5a(4 + 8a + 15a2) = 0 (4 * 5a + 8a * 5a + 15a2 * 5a) = 0 (20a + 40a2 + 75a3) = 0 Solving 20a + 40a2 + 75a3 = 0 Solving for variable 'a'. Factor out the Greatest Common Factor (GCF), '5a'. 5a(4 + 8a + 15a2) = 0 Ignore the factor 5.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 '(4 + 8a + 15a2)' equal to zero and attempt to solve: Simplifying 4 + 8a + 15a2 = 0 Solving 4 + 8a + 15a2 = 0 Begin completing the square. Divide all terms by 15 the coefficient of the squared term: Divide each side by '15'. 0.2666666667 + 0.5333333333a + a2 = 0 Move the constant term to the right: Add '-0.2666666667' to each side of the equation. 0.2666666667 + 0.5333333333a + -0.2666666667 + a2 = 0 + -0.2666666667 Reorder the terms: 0.2666666667 + -0.2666666667 + 0.5333333333a + a2 = 0 + -0.2666666667 Combine like terms: 0.2666666667 + -0.2666666667 = 0.0000000000 0.0000000000 + 0.5333333333a + a2 = 0 + -0.2666666667 0.5333333333a + a2 = 0 + -0.2666666667 Combine like terms: 0 + -0.2666666667 = -0.2666666667 0.5333333333a + a2 = -0.2666666667 The a term is 0.5333333333a. Take half its coefficient (0.2666666667). Square it (0.07111111113) and add it to both sides. Add '0.07111111113' to each side of the equation. 0.5333333333a + 0.07111111113 + a2 = -0.2666666667 + 0.07111111113 Reorder the terms: 0.07111111113 + 0.5333333333a + a2 = -0.2666666667 + 0.07111111113 Combine like terms: -0.2666666667 + 0.07111111113 = -0.19555555557 0.07111111113 + 0.5333333333a + a2 = -0.19555555557 Factor a perfect square on the left side: (a + 0.2666666667)(a + 0.2666666667) = -0.19555555557 Can't calculate square root of the right side. The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.Solution
a = {0}
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