Question

упростите
7a(a-b)-b(b-7a)=
3x(x-2a)-6a(a-x)=
(y^2z^8)^5=

Answer 1

а) 7a(a-b)-b(b-7a)=7а²-7ab-b²+7ab=7a²-b²
б) 3x(x-2a)-6a(a-x)=3х²-6ах-6а²+6ах=3х²-6а²=3(х²-2а²)
в) (y²z⁸)⁵=у¹⁰/z⁴⁰