x²-xy-30y² a²（x-y）³-b（y-x)² a（x-y）²-b（y-x）²分解因式哦

x²-xy-30y² =(x-6)(x+5)
a²（x-y）³-b（y-x)² a（x-y）²-b（y-x）²看不清a²（x-y）³-b（y-x)²a（x-y）²-b（y-x）²分解因式哦a²（x-y）³-b（y-x)²=a²（x-y）³-b（x-y)²=(x-y)²[a²（x-y）-b]=(x-y)²(a²x-a²y-b)a（x-y）²-b（y-x）²=a（x-y）²-b（x-y）²=（x-y）²(a-b)