Question

помогите с алгеброй ..............номер 181 пример 8,10

Answer 1

8)
=(m2-n2)2+2m2n2=m4-2m2n2+n4+2m2n2=m4+n4
10) =(a2-9)(a2-9)+18a2= (a2-9)2+18a2=a4-18a2+81+18a2=a4+81