Question

在下列括号内填上使等式成立的分子或分母(2x^2+4xy+2y^2)/(x^2-xy-2y^2)=2(x+y)/()

Answer 1

(2x²+4xy+2y²)/(x²-xy-2y²)=2(x+y)²/[(x+y)(x-2y)]=2(x+y)/(x-2y)