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Lina20 [59]
3 years ago
6

Determine the direction that this parabola opens y=-5x^2-10x-15

Mathematics
1 answer:
OLga [1]3 years ago
8 0
The parabola opens down.

If the a value is positive it opens up. If it's negative it opens down. If it is 0, it's not quadratic. The a value here is -5
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a(b + c) = ab + ac
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In this case, we'll use the second formula. Substitute any known values into the equation above and simplify:

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The student first made an error in Step 2, and the correct step is:

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