x²+y²-14y+48=0
x+1=0
x=-1
(-1)²+y²-14y+48=0
1+y²-14y+48=0
y²-14y+49=0
Δ=(-14)²-4*1*49=196-196=0
y₀=-(-14)/2*1=14/2=7
y=7
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x²+y²-14y+48=0
x+1=0
x=-1
(-1)²+y²-14y+48=0
1+y²-14y+48=0
y²-14y+49=0
Δ=(-14)²-4*1*49=196-196=0
y₀=-(-14)/2*1=14/2=7
x=-1
y=7