因数分解１

[0]X2 +28X +196=

( X +14 )2

[1]X2 -10X +25=

( X -5 )2

[2]X2 +20X +100=

( X +10 )2

[3]X2 -20X +100=

( X -10 )2

[4]X2 +30X +225=

( X +15 )2

[5]X2 -14X +49=

( X -7 )2

[6]X2 -12X +36=

( X -6 )2

[7]X2 +10X +25=

( X +5 )2

[8]X2 -6X +9=

( X -3 )2

[9]X2 +18X +81=

( X +9 )2



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