1.(9a-3)^2 2.(x^2+2x-1)^2 3. 2(3a+4)(a-6)-(3-a)^2+4(5-a)
don't know which you'd consider simpler same with this one. expand it and get a 4th degree polynomial. 2(3a+4)(a-6) - (3-a)^2 + 4(5-a) = 2(3a^2 - 14a -24) - (9 - 6a + a^2) + 20 - 4a = 6a^2 - 28a - 48 - 9 + 6a - a^2 + 20 - 4a = 5a^2 - 26a - 37
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