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Simplifying (a + -4)(2a + 5)(a + 4) = 0 Reorder the terms: (-4 + a)(2a + 5)(a + 4) = 0 Reorder the terms: (-4 + a)(5 + 2a)(a + 4) = 0 Reorder the terms: (-4 + a)(5 + 2a)(4 + a) = 0 Multiply (-4 + a) * (5 + 2a) (-4(5 + 2a) + a(5 + 2a))(4 + a) = 0 ((5 * -4 + 2a * -4) + a(5 + 2a))(4 + a) = 0 ((-20 + -8a) + a(5 + 2a))(4 + a) = 0 (-20 + -8a + (5 * a + 2a * a))(4 + a) = 0 (-20 + -8a + (5a + 2a2))(4 + a) = 0 Combine like terms: -8a + 5a = -3a (-20 + -3a + 2a2)(4 + a) = 0 Multiply (-20 + -3a + 2a2) * (4 + a) (-20(4 + a) + -3a * (4 + a) + 2a2 * (4 + a)) = 0 ((4 * -20 + a * -20) + -3a * (4 + a) + 2a2 * (4 + a)) = 0 ((-80 + -20a) + -3a * (4 + a) + 2a2 * (4 + a)) = 0 (-80 + -20a + (4 * -3a + a * -3a) + 2a2 * (4 + a)) = 0 (-80 + -20a + (-12a + -3a2) + 2a2 * (4 + a)) = 0 (-80 + -20a + -12a + -3a2 + (4 * 2a2 + a * 2a2)) = 0 (-80 + -20a + -12a + -3a2 + (8a2 + 2a3)) = 0 Combine like terms: -20a + -12a = -32a (-80 + -32a + -3a2 + 8a2 + 2a3) = 0 Combine like terms: -3a2 + 8a2 = 5a2 (-80 + -32a + 5a2 + 2a3) = 0 Solving -80 + -32a + 5a2 + 2a3 = 0 Solving for variable 'a'. The solution to this equation could not be determined.
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