问几道数学因式分解,直接给出答案.
问题描述：
问几道数学因式分解,直接给出答案.
(1)X³-25X (2)m的4次方-16n的4次方 (3)3X的4次方-243 (4)Y²-16 (5)-X²+y²
(6)2X²-8 (7)X的4次方-1 (8)X²Y²-1 (9)4m²-9n² (10)-16x²+9Y²
(11)(a+b)²-c² (12)3X³-12XY² (13)-3+27X² (14)(X+1)(X-1)-8
(15)a的4次方*X的4次方-a的4次方*Y的4次方 (16)3ax²-6axy+3ay² (17)-x²+4x-4
(18)(a+b)²-6(a+b)+9 (19)x²-2xy+y² (20)1-1/2m+1/16m²
一共20题.一题一分,
答
1.x(x+5)(x-5)
2.(m^2+4n^2)(m+2n)(m-2n)
3.3(x^2+9)(x+3)(x-3)
4.(y+4)(y-4)
5.(y-x)(y+x)
6.2(x+2)(x-2)
7.(x^2+1)(x+1)(x-1)
8.(xy+1)(xy-1)
9.(2m+3)(2m-3)
10.(3y+4x)(3y-4x)
11.(a+b+c)(a+b-c)
12.3x(x+2y)(x-2y)
13.3(3x+1)(3x-1)
14.(x+3)(x-3)
15.a的4次方(x^2+y^2)(x+y)(x-y)
16.3a(x-y)^2
17.-(x-2)^2
18.(a+b-3)^2
19.(x-y)^2
20.(m/4-1)^2