Question

Упростить выражение (c-3/c)-(c^2-9/c)*(1/c-3)

Answer 1

$frac{c-3}{c} - frac{c^2-9}{c(c-3)} = frac{(c-3)^2-c^2+9}{c(c-3)} = frac{c^2-6c+9-c^2+9}{c(c-3)}= frac{-6(c-3)}{c(c-3)} = -frac{6}{c}$