十字相乘因式分解的几道计算题1.x^2+2x-82.x^2+3x-103.x^2-x-204.x^2+x-65.2x^2+5x-36.6x^2+4x-27.x^2-2x-38.x^2+6x+89.x^2-x-1210.x^2-7x+1011.6x^2+x+212.4x^2+4x-3

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十字相乘因式分解的几道计算题1.x^2+2x-82.x^2+3x-103.x^2-x-204.x^2+x-65.2x^2+5x-36.6x^2+4x-27.x^2-2x-38.x^2+6x+89.x^2-x-1210.x^2-7x+1011.6x^2+x+212.4x^2+4x-3

十字相乘因式分解的几道计算题1.x^2+2x-82.x^2+3x-103.x^2-x-204.x^2+x-65.2x^2+5x-36.6x^2+4x-27.x^2-2x-38.x^2+6x+89.x^2-x-1210.x^2-7x+1011.6x^2+x+212.4x^2+4x-3
十字相乘因式分解的几道计算题
1.x^2+2x-8
2.x^2+3x-10
3.x^2-x-20
4.x^2+x-6
5.2x^2+5x-3
6.6x^2+4x-2
7.x^2-2x-3
8.x^2+6x+8
9.x^2-x-12
10.x^2-7x+10
11.6x^2+x+2
12.4x^2+4x-3

十字相乘因式分解的几道计算题1.x^2+2x-82.x^2+3x-103.x^2-x-204.x^2+x-65.2x^2+5x-36.6x^2+4x-27.x^2-2x-38.x^2+6x+89.x^2-x-1210.x^2-7x+1011.6x^2+x+212.4x^2+4x-3
1.x^2+2x-8
(x-2)(x+4)
-2*4=-8;-2+4=2
2.x^2+3x-10
(x+5)(x-2)
5*(-2)=-10;-2+5=3
3.x^2-x-20
(x-5)(x+4)
-5*4=-20;-5+4=-1
4.x^2+x-6
(x-2)(x+3)
-2*3=-6;-2+3=1
5.2x^2+5x-3
(2x-1)(x+3)
-1*3=-3;2*3+(-1)*1=5
6.6x^2+4x-2
(6x-2)(x+1)
-2*1=-2;6*1-2*1=2
7.x^2-2x-3
(x-3)(x+1)
-3*1=-3;-3+1=-2
8.x^2+6x+8
(x+2)(x+4)
2*4=8;2+4=6
9.x^2-x-12
(x-4)(x+3)
-3*4=-12;-3+4=1
10.x^2-7x+10
(x-2)(x-5)
-5*(-2)=-10;-2-5=-7
11.6x^2+x+2 --题目抄错!
应该为6x^2+x-2吧
(2x-1)(3x+2)
-1*2=-2;2*2-1*3=1
12.4x^2+4x-3
(2x-1)(2x+3)
-1*3=-3;2*3+2*(-1)=4