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umka2103 [35]
4 years ago
13

How many solutions are there to the equation below?

Mathematics
1 answer:
sertanlavr [38]4 years ago
3 0

Answer: E. 2

Step-by-step explanation:

x²=9

x=±3 ⇔ since it is square (any value after square will always be positive), the value can be negative or positive.

There are 2 solutions: 3 and -3

Hope this helps!! :)

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Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions. 
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3 years ago
Find The vertex of this parabola y=-4x^2-8x-7
Aneli [31]

Answer:

(-1, -3)

Step-by-step explanation:

The <em>standard form</em> of a quadratic function is  

y = ax² + bx + c

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y = a(x - h)² + k

where (h, k) is the vertex of the parabola.

h = -b/(2a) and k = f(h)

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=====

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h = -(-8)/[2(-4)]

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=====

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=====

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