Question

(2+m) во второй степени и (2-m) во второй стени

Answer 1

(2+m)²(2-m)²=(4+4m+m²)(4-4m+m²)=16-16m+4m²+16m-16m²+4m³+4m²-4m³+m⁴=
=m⁴-8m²+16=(m²-4)²