Question

c/(c-5)-c^2/((c-〖5)〗^2 )*(c^2-25)/(5c+25)

Answer 1

$frac{c}{c-5} - frac{c ^{2} }{(c-5)^{2}} * frac{ c^{2}-25 }{5c+25}= frac{c}{c-5} - frac{c ^{2} }{(c-5)(c-5)}* frac{(c-5)(c+5)}{5(c+5)} = \ \ frac{c}{c-5} - frac{c ^{2} }{5(c-5)}= frac{5c- c^{2} }{5(c-5)} = frac{c(5-c)}{5(c-5)} =- frac{c(c-5)}{5(c-5)} =- frac{c}{5} =-0.2c$