Question

(a+2)^2 - (a-3) (a+3)-4(a-5)=?
Срочноо
​

Answer 1

$(a+2)^2 - (a-3) (a+3)-4(a-5)=a^2+4a+4-(a^2-9)-4a+20=a^2+4-a^2+9+20=33$