Question

Решите пожалуйста 49х^2-(5х+у)^2=
(Х^2+1)^2=

Answer 1

1. 49х^2-(5х+у)^2= 49x^2-(25x^2+10xy+y^2)=49x^2-25x^2-10xy-y^2=24x^2-10xy-y^2
2. (Х^2+1)^2=x^4+2x^2+1