42.因式分解9x2-66x+121=.43.因式分解8-2x2=.44.因式分解x2-x+14=.45.因式分解9x2-30x+25=.46.因式分解-20x2+9x+20=.47.因式分解12x2-29x+15=.48.因式分解36x2+39x+9=.49....
-22y2+35y-3=(2y-3)(-11y+1).再利用十字相乘法对关于x的二次三项式分解所以原式=〔x+(2y-3)〕〔2x+(-11y+1)〕=(x+2y-3)(2x-11y+1).上述因式分解的过程,实施了两次十字相乘法.如果把这两个步骤...
1.因式分解3a^3b^2c-6a^2b^2c^2+9ab^2c^3=3ab^2c(a^2-2ac+3c^2)2.因式分解xy+6-2x-3y=(x-3)(y-2)3.因式分解x^2(x-y)+y^2(y-x)=(x+y)(x-y)^24.因式分解2x^2-(a-2b...
因式分解3a3b2c-6a2b2c2+9ab2c3=3ab^2c(a^2-2ac+3c^2)3.因式分解xy+6-2x-3y=(x-3)(y-2)4.因式分解x2(x-y)+y2(y-x)=(x+y)(x-y)^25.因式分解2x2-(a-2b)x-ab=(2x-a)(x...
17.因式分解(1)8x2-18(2)x2-(a-b)x-ab18.因式分解下列各式(1)9x4+35x2-4(2)x2-y2-2yz-z2(3)a(b2-c2)-c(a2-b2)19.因式分解(2x+1)(x+1)+(2x+1)(x-3)20.因式分解39x...
4.abc+ab-4a=a(bc+b-4)5.16x2-81=(4x+9)(4x-9)6.9x2-30x+25=(3x-5)^27.x2-7x-30=(x-10)(x+3)8.x2-25=(x+5)(x-5)9.x2-20x+100=(x-10)^210.x2+4x+3=(x+1)...
20.若4x2+8x+3是2x+1的倍式请因式分解4x2+8x+3=.21.2x+1是4x2+8x+3的因式,请因式分解4x2+8x+3=.22.(1)x+2(2)x+4(3)x+6(4)x-6(5)x2+2x3+24上列何者x2-2x-24的因式...
(2x-9y)(7x-2y)例6把10x²-27xy-28y²-x+25y-3分解因式分析:在本题中,要把这个多项式整理成二次三项式的形式解法一、10x²-27xy-28y²-x+25y-3=10x²-(27y+1)x-(...
20.对x4+4进行因式分解,所得的正确结论是[]A.不能分解因式B.有因式x2+2x+2C.(xy+2)(xy-8)D.(xy-2)(xy-8)21.把a4+2a2b2+b4-a2b2分解因式为[]A.(a2+b2+ab)2B.(a2+b2+ab)(a2+b2-ab)C.(a2-b2+...
12、x^6+8x^3+913、x^2-100x+9914、x^2-x-y^2-y15、7x^2-19x-616、8x^2-6x-917、x+1)(x+2)-1218、x^2+(p+q)x+pq19、3x^3-6x^2+320、a^2(x-2a)^2-a(x-2a)^2...