Question

Разложите на множители:1)49a2b4-100c4,2)(x+1)2+(x-1)2

Answer 1

1) = (7аb²)² - (10c²)² = (7ab²-10c²)(7ab²+10c²)
2) = х²+2х+1+х²-2х+1=2х²+2=2(х²+1)