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allochka39001 [22]
3 years ago
6

If the coefficient a in the general quadratic equation is equal to 9, what is the focal length for the

Mathematics
1 answer:
lutik1710 [3]3 years ago
5 0

Answer:

9

Step-by-step explanation:

Let the equation of a parabola be

y^{2} = 4ax.

Then , focal length of the parabola is a.

As , (0,0) is the vertex and its focus is (a,0)

Thus, focal length comes out to be a.

Here,

a is given as 9 units .

Thus focal length of the parabola, d, equals to 9 units

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