Odpowiedź :
x²+4x+4=y+x²-9
y²-2y+1+7y=y²
4x=y-13
5y=-1
4x=-13-1/5
y=-1/5
x=-3,3
y=-1/5
y²-2y+1+7y=y²
4x=y-13
5y=-1
4x=-13-1/5
y=-1/5
x=-3,3
y=-1/5
(x+2)²=y+(x+3)(X-3)
(y-1)²+7y=y²
x² +2x+4=y+x²-9
(y²-2y+1)+7y-y²=0
x² +2x-x² +13=y
y²-2y+7y-y²=-1
2x+13=y
5y=-1
y=-1/5
x=-3,3
(y-1)²+7y=y²
x² +2x+4=y+x²-9
(y²-2y+1)+7y-y²=0
x² +2x-x² +13=y
y²-2y+7y-y²=-1
2x+13=y
5y=-1
y=-1/5
x=-3,3