Question

Resolver
[(x+4)(x+3)-12]^2-144x^2

Answer 1

[(x+4)(x+3)-12]^2-144x^2

[ x^2 + 7x + 12]^2 - 144x^2

x^4 + 91x^3 + 73x^2 + 168x + 144 - 144x^2

x^4 + 91x^3 - 71x^2 + 168x + 144