Question

Simplify the polynomial below

(a^3 + 4a^2 − 7) + (3a^3 − 2a^2 + 1)

Answer 1

$(a^3+4a^2-7)+(3a^3-2a^2+1)=a^3+4a^2-7+3a^3-2a^2+1\\\\=(a^3+3a^3)+(4a^2-2a^2)+(-7+1)=4a^3+2a^2-6$