Question

упростить выражение x^2+9y^2//3y-x+6xy//x-3y

Answer 1

$frac{ x^{2} +9y ^{2} }{3y-x}+ frac{6xy}{x-3y}=frac{ x^{2} +9y ^{2} }{3y-x}- frac{6xy}{3y-x}= frac{x ^{2}+9y ^{2} + 6xy}{3y-x}= frac{(3y+x) ^{2} }{3y-x}$