Teman-teman isa bantuin no.1 d & e ?? Bantuin yaa..

1. d) x³y-y³x / x²-xy² = x(x²y-y³) / x(x-y²)
                              = x²y-y³ / x-y²
 
    e) x²-4xy+3y² / y²-x² = (x-y)(x-3y) / (y-1)(y+1)