Question

(A+1)^2+3(A-1)^2-5(A+1)(A-1)

Answer 1

(A+1)^2+3(A-1)^2-5(A+1)(A-1)=-A^2-4A-1

Answer 2

A^2+2a+1+3a^2-6a+3-5a^2=-a^2-4a+9