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raketka [301]
3 years ago
13

The equation of a parabola is 18(y−5)2=x+3 .

Mathematics
1 answer:
Bad White [126]3 years ago
6 0
<span>1/8(y−5)²=x+3
(y-5)² = 8(x+3)

The formula of parabola in standard form
(y-k)² = 4p(x-h),  (h, k) - vertex,  (h+p, k) focus
For our parabola 
vertex (-3,5)
4p=8
p=2
This is a horizontal parabola because y².
So to find the coordinates of the focus we need to add to x coordinate of vertex.
</span>(-3+2, 5) = (-1,5) focus
Correct answer is  (-1,5).<span>


</span>
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