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If the vertex of the parabola is the point (–3, 0) and the directrix is the line x + 5 = 0, then its equation is
A. y² = 8 (x + 3)
B. x² = 8 (y + 3)
C. y² = – 8 (x + 3)
D. y² = 8 ( x + 5)

Answers (1)

Given: Vertex =(–3, 0) and the directrix x = -5(M)

So focus S (-1,0)

For any point of parabola P (x,y) we have

SP=PM

$\sqrt{(x+1)^{2}+y^{2}}=\left | x+5 \right |$

x²+y²+2x+1=x²+10x+25

y²=8x+24

Posted by

infoexpert22

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