十字相乘分解因式:十字相乘分解因式:分解因式:分解因式:x3x2
2
x23x2x25x6x24x12x210x92x25x32x27x33x28x36x25x25
x22x3x25x6x22x63x23x102x23x202x27x63x25x2
x22x3x25x6x28x15x22x152x25x72x27x65x23x2
x25x6x2x2x212x32
分解因式:分解因式:2x5x2
2
2x27x33x27x65x26x8
2分解因式:2分解因式:xxaa
6x27x33x310x23x
x34x221xx410x29
x46x227
2x3232x32
分解因式分解因式(1)x7x6;
42
x28x222x28x120
(2)x5x36;
42
4224(3)4x65xy16y;
(4)a7ab8b;
6336
(5)6a5a4a;
432
(6)4a37ab9ab.
64224
答案:十字相乘分解因式:答案:十字相乘分解因式:分解因式:分解因式:
x23x2x2x1)x22x3x3x1x25x6x3x2x25x6x6x1x24x12x6x2x28x15x3x5
x22x3x3x1x25x6x2x3x25x6x6x1x2x2x2x1x22x63x9x7x212x32x8x4
fx210x9x9x1x22x15x5x3
分解因式:分解因式:
x23x10x5x2
2x25x22x1x22x23x202x5x42x27x32x1x32x27x62x3x23x27x63x2x33x25x23x2x15x26x85x4x26x211x32x33x1
分解因式:分解因式:
2x25x32x1x32x25x72x7x12x27x32x1x32x2x62x3x23x28x33x1x35x23x25x2x16x25x252x53x5
x2xa2axa【xa13x310x23xx3x1x3
x34x221xxx7x3x46x227x3x3x23
x410x29x3x3x1x1
2x3232x322x12x1x28x222x28x120x28x10x2x6
222(1)原式x1x6x1x1x6222(2)原式x9xr