Réponses

2013-12-09T18:52:16+01:00
A=t²+81+18t
A=(t+9)²

B=4x²-4xy+yx²
B=(2x+y)²

C=81+16y²-72y
C=(9-4y)²

D=x²+36-12x
D=(x-6)²
2013-12-09T18:53:19+01:00
A= t²+81+18t
=(t+9)²

B=4x²-4xy+y²
=(2x-y)²

C=81+16y²-72y
=(9-4y)²

D=x²+36-12x
=(x-6)²