Suppose that the point A(x,y) belongs to this parabola. The defining point of the parabola is that the distance between a point F and the directrix. Suppose that the chosen point F is at (a,b). Then, the distance from A to the directrix is |b+4| while the distance from A to the focus is given by the pythagorean theorem:
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We have that these two have to be equal. Squaring both sides we get:
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This is the equation that describes all equations of parabolas with that directrix; you just need to choose the focus and substituting a and b will yield the equation.
C loser that’s the correct number
<span>(x ^1/8) (x^3/8) = x^4/8=x^1/2 = 12, x = 12^2 = 144
x=144
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Answer:
no it is not
Step-by-step explanation: