Répondre :
a) 30y²
b) 18x+3x²
c) 5x²+40x
d) 30+5y+6y+y²=30+11y+y²
a)(3t+7)²=9t²+42t+49
b)(y-7)²=y²-14y+49
c) (a+5)²=a²+10a+25
d)(x-1)²=x²-2x+1
b) 18x+3x²
c) 5x²+40x
d) 30+5y+6y+y²=30+11y+y²
a)(3t+7)²=9t²+42t+49
b)(y-7)²=y²-14y+49
c) (a+5)²=a²+10a+25
d)(x-1)²=x²-2x+1
a.(5y) *(6y)=30y²
b.(6+x)*(3x)=18x+3x²
c.(5x)*(x+8)=5x²+40x
d.(5+y)*(6+y)=30+5y+6y+y²=y²+11y+30
a(3t+7)²=9t²+42t+49
b.(y-7)²=y²-14y+49
c.(a+5)²=a²+10a+25
d.(x-1)²=x²-2x+1
b.(6+x)*(3x)=18x+3x²
c.(5x)*(x+8)=5x²+40x
d.(5+y)*(6+y)=30+5y+6y+y²=y²+11y+30
a(3t+7)²=9t²+42t+49
b.(y-7)²=y²-14y+49
c.(a+5)²=a²+10a+25
d.(x-1)²=x²-2x+1