Question

упростить выражения
10y-(12y-(y-6))

2x(3x-4)-3x(3x-1)

(c-2)(c-3)-(c-1)^2

Answer 1

$10y-(12y-(y-6))=10y-(12y-y+6)=10y-11y-6=-y-6 \ 2x(3x-4)-3x(3x-1)=6 x^{2}-8x-9 x^{2}+3x=-3 x^{2}-5x$