1樓:宇文仙
1.ab³-4ab=ab(b²-4)=ab(b+2)(b-2)2.3x²y+12xy²+12y³
=3y(x²+4xy+4y²)
=3y(x+2y)²
3.x³y-2x²y²+xy³
=xy(x²-2xy+y²)
=xy(x-y)²
4.12a⁴b²-27a²b⁴
=3a²b²(4a²-9b²)
=3a²b²(2a+3b)(2a-3b)
5.x²-xy+xz-yz
=x(x-y)+z(x-y)
=(x-y)(x+z)
6.x²-y²+xz+yz
=(x+y)(x-y)+z(x+y)
=(x+y)(x-y+z)
7.x²-4xy+4y²-1
=(x-2y)²-1
=(x-2y+1)(x-2y-1)
8.x²-y²-z²+2yz
=x²-(y²-2yz+z²)
=x²-(y-z)²
=(x+y-z)(x-y+z)
9.m²-n²-2n-1
=m²-(n²+2n+1)
=m²-(n+1)²
=(m+n+1)(m-n-1)
10.4-a²+2a-1
=4-(a²-2a+1)
=4-(a-1)²
=(2+a-1)(2-a+1)
=(a+1)(3-a)
11.9a²-b²-4b-4
=9a²-(b²+4b+4)
=(3a)²-(b+2)²
=(3a+b+2)(3a-b-2)
12.9的平方-2a-35 【??什麼意思?】13.(a+b)²+7(a+b)+6
=(a+b+1)(a+b+6)
14.x²-5xy-6y²
=(x+y)(x-6y)
15.(x²+2x)²-(x²+2x)-2=(x²+2x+1)(x²+2x-2)
=(x+1)²(x²+2x-2)
如果不懂,請追問,祝學習愉快!
2樓:匿名使用者
1.m2(p-q)-p+q; 2.a(ab+bc+ac)-abc; 3.x4-2y4-2x3y+xy3;
4.abc(a2+b2+c2)-a3bc+2ab2c2; 5.a2(b-c)+b2(c-a)+c2(a-b); 6.(x2-2x)2+2x(x-2)+1; 7.(x-y)2+12(y-x)z+36z2; 8.x2-4ax+8ab-4b2;
9.(ax+by)2+(ay-bx)2+2(ax+by)(ay-bx); 10.(1-a2)(1-b2)-(a2-1)2(b2-1)2; 11.(x+1)2-9(x-1)2; 12.4a2b2-(a2+b2-c2)2; 13.ab2-ac2+4ac-4a; 14.x3n+y3n; 15.(x+y)3+125; 16.(3m-2n)3+(3m+2n)3; 17.x6(x2-y2)+y6(y2-x2); 18.8(x+y)3+1;
19.(a+b+c)3-a3-b3-c3; 20.x2+4xy+3y2;
解答1.(p-q)(m-1)(m+1).
答案在此
求15道初二因式分解的題目 與詳細解題過程……要惡補一下了 高分懸賞 30
3樓:淋浴行
(1)-6ax3y+8x2y2-2x2y
(2)3a2(x-y)3-4b2(y-x)2(3)(x+y)(m-a)-3y(a-m)2+(a-m)3(4)8x(a-1)-4(1-a)
(5)m(1-a)+mn(1-a)+1-a(1)16x4-64y4
(2)16x6-1/4
(3)(a6+b4)2-4a6b4
(5)-2m8+512
(6)(x+y)3-64 或m3-64n3
4樓:匿名使用者
1.2x³-8x
=2x(x+2)(x-2)
2.4b²c²-(b²+c²-a²)²
=-(b+c+a)(b+c-a)(b-c+a)(b-c-a)
5樓:
我也正在找,你給我15到的話我給你分!!555555555
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