(1)b(a-1)(a+1)(a-2)(a+2) (2)3mn(m-6n)(m+4n)
(3)(x-y)(x+y)(x-3y)(x+3y) (4)(x-2y)(x+2y)(x-3y)(x+3y)
(5)(x^2-4y^2)^2 (7)a(a+3b)(a-8b)
(8)3ab^2(a-1)(2a-1)
x^2+mx+24能分解因式,要求
方程x^2+mx+24=0有解
m^2-96>=0,即m>=根号96或吗