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Harrizon [31]
4 years ago
15

What is the x coordinate of the vertex of the parabola whose equation is y=3x^2+9x?

Mathematics
2 answers:
Lina20 [59]4 years ago
7 0
Find the vertex by setting the 1st derivative to 0
1st derivative is y=6x+9.

6x+9=0 => x=-9/6 = -3/2

So B is the answer.
Nata [24]4 years ago
3 0

-1, because I said so.

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