因数分解１

[0]X2 -9=

( X -3 )( X +3)

[1]X2 -121=

( X +11 )( X -11)

[2]X2 -121=

( X -11 )( X +11)

[3]X2 -225=

( X +15 )( X -15)

[4]X2 -81=

( X -9 )( X +9)

[5]X2 -9=

( X +3 )( X -3)

[6]X2 -64=

( X -8 )( X +8)

[7]X2 -196=

( X -14 )( X +14)

[8]X2 -144=

( X -12 )( X +12)

[9]X2 -1=

( X +1 )( X -1)



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