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Simplifying (a + -4)(5a + 3)(a + 4) = 0 Reorder the terms: (-4 + a)(5a + 3)(a + 4) = 0 Reorder the terms: (-4 + a)(3 + 5a)(a + 4) = 0 Reorder the terms: (-4 + a)(3 + 5a)(4 + a) = 0 Multiply (-4 + a) * (3 + 5a) (-4(3 + 5a) + a(3 + 5a))(4 + a) = 0 ((3 * -4 + 5a * -4) + a(3 + 5a))(4 + a) = 0 ((-12 + -20a) + a(3 + 5a))(4 + a) = 0 (-12 + -20a + (3 * a + 5a * a))(4 + a) = 0 (-12 + -20a + (3a + 5a2))(4 + a) = 0 Combine like terms: -20a + 3a = -17a (-12 + -17a + 5a2)(4 + a) = 0 Multiply (-12 + -17a + 5a2) * (4 + a) (-12(4 + a) + -17a * (4 + a) + 5a2 * (4 + a)) = 0 ((4 * -12 + a * -12) + -17a * (4 + a) + 5a2 * (4 + a)) = 0 ((-48 + -12a) + -17a * (4 + a) + 5a2 * (4 + a)) = 0 (-48 + -12a + (4 * -17a + a * -17a) + 5a2 * (4 + a)) = 0 (-48 + -12a + (-68a + -17a2) + 5a2 * (4 + a)) = 0 (-48 + -12a + -68a + -17a2 + (4 * 5a2 + a * 5a2)) = 0 (-48 + -12a + -68a + -17a2 + (20a2 + 5a3)) = 0 Combine like terms: -12a + -68a = -80a (-48 + -80a + -17a2 + 20a2 + 5a3) = 0 Combine like terms: -17a2 + 20a2 = 3a2 (-48 + -80a + 3a2 + 5a3) = 0 Solving -48 + -80a + 3a2 + 5a3 = 0 Solving for variable 'a'. The solution to this equation could not be determined.
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