Question

упростите выожение 2c(1+c)-(c-2)(c+4)

Answer 1

2c+2c²-(c²+4c-2c-8)

2c+2c²-c²-4c+2c+8
c²+8 

Answer 2

2c(1+c)-(c-2)(c+4)=2c+2c^2-c^2-2c+8=c^2+8