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Simplifying (a + -6)(a + 4)(a + 7) = 0 Reorder the terms: (-6 + a)(a + 4)(a + 7) = 0 Reorder the terms: (-6 + a)(4 + a)(a + 7) = 0 Reorder the terms: (-6 + a)(4 + a)(7 + a) = 0 Multiply (-6 + a) * (4 + a) (-6(4 + a) + a(4 + a))(7 + a) = 0 ((4 * -6 + a * -6) + a(4 + a))(7 + a) = 0 ((-24 + -6a) + a(4 + a))(7 + a) = 0 (-24 + -6a + (4 * a + a * a))(7 + a) = 0 (-24 + -6a + (4a + a2))(7 + a) = 0 Combine like terms: -6a + 4a = -2a (-24 + -2a + a2)(7 + a) = 0 Multiply (-24 + -2a + a2) * (7 + a) (-24(7 + a) + -2a * (7 + a) + a2(7 + a)) = 0 ((7 * -24 + a * -24) + -2a * (7 + a) + a2(7 + a)) = 0 ((-168 + -24a) + -2a * (7 + a) + a2(7 + a)) = 0 (-168 + -24a + (7 * -2a + a * -2a) + a2(7 + a)) = 0 (-168 + -24a + (-14a + -2a2) + a2(7 + a)) = 0 (-168 + -24a + -14a + -2a2 + (7 * a2 + a * a2)) = 0 (-168 + -24a + -14a + -2a2 + (7a2 + a3)) = 0 Combine like terms: -24a + -14a = -38a (-168 + -38a + -2a2 + 7a2 + a3) = 0 Combine like terms: -2a2 + 7a2 = 5a2 (-168 + -38a + 5a2 + a3) = 0 Solving -168 + -38a + 5a2 + a3 = 0 Solving for variable 'a'. The solution to this equation could not be determined.
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