160)ա) (m+n)=m^2+2m+n^2

բ)(2+x)^2=2^2+4x+x^2=4+4x+x^2

գ)(y+4)^2=y^2+y×4+4^2=y^2+8y+16

դ)(1+p)^2=1^2+2×1×p^2=1+2p+p^2

Ե