(x²;+x)²;-26(x²;+x)+120 ax+ay+bx+by-a-b x²;(x²;-y²;)-72y⁴;

(x²;+x)²;-26(x²;+x)+120 ax+ay+bx+by-a-b x²;(x²;-y²;)-72y⁴;

你這是化簡吧(x²;+x)²;-26(x²;+x)+120 =(x²;+x-6)(x²;+x-20)=(x-2)(x+3)(x-4)(x+5)
ax+ay+bx+by-a-b=a(x+y)+b(x+y)-(a+b)=(x+y)(a+b)-(a+b)=(a+b)(x+y-1)
x²;(x²;-y²;)-72y⁴;=x⁴;-x²;y²;-72y⁴;=(x²;+8y²;)(x²;-9y²;)=(x²;+8y²;)(x-3y)(x+3y)