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Crank
2 years ago
15

Help with #9 please?

Mathematics
1 answer:
nekit [7.7K]2 years ago
4 0
We're given a parabola

y=x^2-4

and a line

y = 2x+b

The zeros of the parabola are

0=x^2-4

4=x^2

x=\pm 2

We see that (-2,0) is on the line as well:

y = 2x+b

0 = 2(-2)+b

b=4

Choice D


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