(x-3)*(x+3)-(x+8)*(x-8)= (2a+1)*(2a-1)+(a-7)*(a+7)=

Question

(x-3)*(x+3)-(x+8)*(x-8)=
(2a+1)*(2a-1)+(a-7)*(a+7)=

Answer 1

X^2-9-х^2+64=55
4а^2-1+а^2-49=5а^2-50

Answer 2

XE2-9-(xE2-64)=xe2-9-xE2+64=55;
4aE2-1+aE2-49=5aE2-50;