(c+3)^2-c(7-5c) упростите

Question

(c+3)^2-c(7-5c) упростите

Answer 1

C²+6c+9-7c+5c²=6c²-c+9

Answer 2

( c + 3 )^2 - c( 7 - 5c ) = c^2 + 6c + 9 - 7c + 5c^2 = 6c^2 - c + 9