Question

1.упростите выражение (2-c)^2-c(c+4)
(8b-8)(8b+8)-8b(8b+8)

Answer 1

$1)(2-c) ^{2} -c(c+4)=2+c ^{2} -4c-c ^{2} -4c=2-8c \\ \\ 2)(8b-8)(8b+8)-8b(8b+8)=64b ^{2} -64-64b ^{2} -64b= \\ =-64-64b$