Question

Хеллп срочно Упростите выражение 20cy+2(c-5y)^2

Answer 1

20су+2(с²-10су+25у²)=20су+2с²-20су+50у²=2(с²+25у²)

Answer 2

20cy+2(c-5y)²=20cy+2(c²-10cy+25y²)=20cy+2c²-20cy+50y²=
=2c²+50y²=2(c²+25y²)