Question

Задание 2 1-3 примеры

Answer 1

1) 400-y^2=20^2-y^2=(20-y)(20+y)
2) x^2-121=x^2-11^2=(x-11)(x+11)
3) -0,25x^2+y^2 z^2=-4/1x^2+y*2 z^2= y^2 z^2-4/1x^2=(yz-2/1x)(yz+2/1x)