Répondre :
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
E=4/9p²+4/3pq+q²
=(2/3p+q)²
F=pi²+10pi+25
=(pi+5)²
=(t+9)²
B=4x²-4xy+y²
=(2x-y)²
C=81+16y²-72y
=(9-4y)²
D=x²+36-12x
=(x-6)²
E=4/9p²+4/3pq+q²
=(2/3p+q)²
F=pi²+10pi+25
=(pi+5)²