Answer in factored form A^4-2a^2-35
\(a^{4} - 2a^{2} - 35\)\(a^{4} - 7a^{2} + 5 a^{2} - 35\)Pull out common factor,a²(a²-7)+5(a²-7)(a²+5) (a²-7)The answer would be (a²+5)(a²-7).
