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Sagot :

LEPETITCOALAFR

Réponse:

a=100-x²

=10²-x²

=(10-x)(10+x)

b=x²+6x+9

=x²+2*3*x+3²

=(x+3)²

c=36x² -25

=(6x)²-5²

=(6x-5)(6x+5)

d=9x²-12x+4

=(3x)²-2*6*x+2²

=(3x)²-2*2*3x+2²

=(3x)²-2*3x*2+2²

=(3x-2)²

e=49x² -49

=(7x)²-7²

=(7x-7)(7x+7)

f=100-40x+4x²

=10²-2*10*2x+(2x)²

=(10-2x)²

Voilaaa

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