Factorization of (a ^ 2-1) (a ^ 2 + 8A + 15) - 20 | Math enthusiast | Mathematical art

Factorization of (a ^ 2-1) (a ^ 2 + 8A + 15) - 20

=(a+1)(a-1)(a+3)(a+5)-20=[(a-1)(a+5)][(a+1)(a+3)]-20=[(a^2+4a)-5][(a^2+4a)+3]-20=(a^2+4a)^2-2(a^2+4a)-15-20=(a^2+4a)^2-2(a^2+4a)-35=(a^2+4a-7)(a^2+4a+5)

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