упростить 2c(b+15c)+(b-6c)(5c+2b)

Question

упростить 2c(b+15c)+(b-6c)(5c+2b)

Answer 1

2c(b+15c)+(b-6c)(5c+2b)=2св+30с²+5вс+2в²-30с²-12вс=2в²-5вс=в(2в-5с)