初二上因式分解带过程的,10到就好拜托各位数学高手噢噢噢噢~~~_百度...
x2-5x+6=(x-2)(x-3)x2-21x-100=(x-25)(x+4)x2-15x-100=x2-20x+5x-20x5=(x-20)(x+5)x2-100=x2-10x+10x-10x10=(x-10)(x+10)x2+13x-90=x2-5x+18x-5x18=(x-5)(x+18)x2-16x-80=x2-20x+4x-20x4=(x-20)(x+4)x2-9x-80=x2-16x+5x-16x5=(x-16)(...
谁有好点的初二上数学的因式分解的题...急啊...
=(x+3y)(x+y)(x-y)(x+2y)(x-2y)分解因式m +5n-mn-5m 解:m +5n-mn-5m= m -5m -mn+5n = (m -5m )+(-mn+5n)=m(m-5)-n(m-5)=(m-5)(m-n)分解因式bc(b+c)+ca(c-a)-ab(a+b)解:bc(b+c)+ca(c-a)-ab(a+b)=bc(c-a+a+b)+ca(c-a)-ab(a+b)=...
八年级数学下题目,关于因式分解的(求详细过程)
1.由a-b=b-c得a+c=2b ∴b=1\/2(a+c)代入a-b=3\/5中得a-1\/2(a+c)=3\/5 ∴a-c=6\/5 ∵ a²+b²+c²-(ab+bc+ac)=1\/2[(a-b)²+(b-c)²+(a-c)²]∴ab+bc+ac=a²+b²+c²-1\/2[(a-b)²+(b-...
求因式分解算式30道,带答案 最好是初二的
27、3X^2+6X+3=(3X+3)(X+1)28、4X^2+14X+10=(2X+5)(2X+2)29、5Y^2+11Y+2=(5Y+1)(Y+2)30、2Y^2-11Y-21=(2Y+3)(Y-7)
数学10道因式分解题 题随便如题
=-(x2y·x2-x2y·xy+x2y·y2)=-x2y(x2-xy+y2)(3)xn+3xn-1+xn-2=xn-2·x2+xn-2·3x+xn-2·1 =xn-2(x2+3x+1)(4)5(x-y)3+10(y-x)2=5(x-y)3+10(x-y)2 =5(x-y)2(x-y+2)(5)m(5ax+ay-1)-m(3ax-ay-1)=m[(5ax+ay-1...
初二数学因式分解 要过程讲解
(1)将式子拆开再进行化简得4xy,再带入得4*11\/75*25\/22=2\/3 (2)a²-b²=(a+b)(a-b)=1004*2=2008 (3)x²-y²=(x+y)(x-y),x-y就等于(x²-y²)\/(x+y)=-1\/(1\/2)=-2 ...
好人兼天才进几道八下数学因式分解解方程的题目 实在一下子脑子扳住做...
x^2-6x-91=0 (x-13)(x+7)=0 x=13,x=-7 4(x-3)^2+x(3-x)=0 4(x-3)^2-x(x-3)=0 (x-3)(4x-13-x)=0 (x-3)(3x-13)=0 x=3,x=13\/3 (3x-1)^2=4(2x-3)^2 (3x-1)^2-(4x-6)^2=0 (3x-1+4x-6)(3x-1-4x+6)=0 (7x-7)(-x+5)=0 x=1,x...
初二数学因式分解题,求高手解答!麻烦每道题补充下简单的过程,谢谢!
(10)=x^2-4xy+4y^2+8xy =x^2+4xy+4y^2 =(x+2y)^2 (11)(x+y-2)^2 (12)=(9a^2-4b^2)^2 =(3a+2b)^2(3a-2b)^2 第题(1)(6a-5)(a+3)(2)(5m+1)(2m-3)(3)(a+b-1)(2a+2b-1)(4)(x-4y)(x+3y)(5)=(x^2-1)(x^2-1-x-5)=(x+1)(x-1)(x^2-...
初二上数学,几道因式分解题,要有详细的解题过程
(1)a²(a-b)+b²(b-a)=(a-b)(a²-b²)=(a-b)²(a+b)2)(x-1)(x-3)+1 =x²-4x+3+1 =x²-4x+4 =(x-2)²3)(x+y)²-4(x+y-1)=(x+y)²-4(x+y)+4 =(x+y-2)²4)ax-bx+ay-by =x(...
初二数学题,因式分解
1.若(x²+px+8)(x²-3x+q)=x^4+(p-3)x^3+(-3p+q+8)x^3+(pq-24)x+8q 不含x²项和x³项 -3p+q+8=0;p-3=0 p=3;q=1 B正确 m²-mn+mx-nx =m²+mx-mn-nx =m(m+x)-n(m+x)=(m-n)(m+x)...