Question

плиз решите
(a-4)^2-2(a-4)(a+4)+(a+4)^2

Answer 1

$(a-4)^2-2(a-4)(a+4)+(a+4)^2=(a-4-(a+4))^2=\=(a-4-a-4))^2=(-8)^2=64$

Answer 2

=а²-8а+16-2а²-8а+8а+32+а²+8а+16=64