因数分解３

[0]7X2 +35X -462=

7( X +11 )( X -6)

[1]4X2 -28X +40=

4( X -5 )( X -2)

[2]7X2 +21X -70=

7( X +5 )( X -2)

[3]5X2 -80X +300=

5( X -10 )( X -6)

[4]3X2 +3X -18=

3( X +3 )( X -2)

[5]6X2 -132X +720=

6( X -12 )( X -10)

[6]5X2 +60X +100=

5( X +2 )( X +10)

[7]3X2 -6X -144=

3( X -8 )( X +6)

[8]8X2 +160X +792=

8( X +11 )( X +9)

[9]2X2 +10X -168=

2( X -7 )( X +12)



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