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Simplifying (7a + -3)(4a2 + -5a + -7) = 0 Reorder the terms: (-3 + 7a)(4a2 + -5a + -7) = 0 Reorder the terms: (-3 + 7a)(-7 + -5a + 4a2) = 0 Multiply (-3 + 7a) * (-7 + -5a + 4a2) (-3(-7 + -5a + 4a2) + 7a * (-7 + -5a + 4a2)) = 0 ((-7 * -3 + -5a * -3 + 4a2 * -3) + 7a * (-7 + -5a + 4a2)) = 0 ((21 + 15a + -12a2) + 7a * (-7 + -5a + 4a2)) = 0 (21 + 15a + -12a2 + (-7 * 7a + -5a * 7a + 4a2 * 7a)) = 0 (21 + 15a + -12a2 + (-49a + -35a2 + 28a3)) = 0 Reorder the terms: (21 + 15a + -49a + -12a2 + -35a2 + 28a3) = 0 Combine like terms: 15a + -49a = -34a (21 + -34a + -12a2 + -35a2 + 28a3) = 0 Combine like terms: -12a2 + -35a2 = -47a2 (21 + -34a + -47a2 + 28a3) = 0 Solving 21 + -34a + -47a2 + 28a3 = 0 Solving for variable 'a'. The solution to this equation could not be determined.
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