Question

(x-8)^2 =
(5+2а)^2=
(3х-2y)^2=
(-3-m)^2=
(x+5)(x-5)
(20-1)(x-5)
раскрыть скобки

Answer 1

(x-8)^2=x^2-2*x*8+8^2=x^2-16x+64
(5+2a)^2=5^2+2*5*2a+(2a)^2=25+20a+4a^2