Sagot :
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
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
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
=(t+9)²
B=4x²-4xy+y²
=(2x-y)²
C=81+16y²-72y
=(9-4y)²
D=x²+36-12x
=(x-6)²