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Leokris [45]
3 years ago
9

I need to know the answer

Mathematics
1 answer:
almond37 [142]3 years ago
4 0

Answer:

A

Step-by-step explanation:

That's the formula for the solution of a quadratic equation, like this:

a {x}^{2}  + bx   +  c = 0

The formula is:

x =  \frac{ - b± \sqrt{ {b}^{2} \:  - 4ac } }{2a}

In your case:

a = 7 \\ b =  - 5 \\ c =  - 2

The only answer that has c = -2 is the first one, A.

If you move the 5 to the left-hand side, it becomes -5 and with the +3 gives a -2.

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