Question

упростите (a-4)2-2a(3a-4)

Answer 1

(a-4)^2-2a(3a-4)=a^2-8a+16-6a^2+8a=a^2+16-6a^2=16-5a^2

Answer 2

$(a - 4)^2 - 2a(3a - 4) = a^2 - underline{8a} + 16 - 6a^2 + underline{8a} =\\ a^2 + 16 - 6a^2 = boxed{ 16 - 5a^2 }$