Question

преобразуйте в многочлен выражения:1.7c(4c+2)-(7+c)^2
2.-3c(6c+2)-(-3+c)^2

Answer 1

1. 7c(4c+2)-(7+c)^2=28c^2+14c-49-14c-c^2
2. -3c(6c+2)-(-3+c)^2=-18c^2-6c-c^2+6c-9

Answer 2

$1)7c(4c+2)-(7+c) ^{2}=28c ^{2} +14c -49-14c- c^{2} = 27c ^{2} -49;\ 2)-3c(6c+2)-(-3+c) ^{2} =-18c ^{2} -6c -9+6c-c ^{2} =-19c ^{2} -9$