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Alisiya [41]
2 years ago
11

How can you tell if a function is quadratic?

Mathematics
1 answer:
Paha777 [63]2 years ago
3 0
There are several ways, but the general format follows f(x) = ax2 + bx + c f(x) = ax² + bx + c, where A, B, and C are non-zero numbers. Another way of finding a quadratic equation is examining the graph of it, you'll notice a "U" shape called a parabola, which come in many shapes but they all retain a "U"-like curve.
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What is the sign of f on the interval -2
TEA [102]

Answer:

f is sometimes positive and sometimes negative.

Step-by-step explanation:

f(x)=(x-3)(x+2)(x+4)(x+4)(x-1)(2x-9)

Take x=-1\in(-2,\frac{9}{2})\ as-2

f(-1)=(-1-3)(-1+2)(-1+4)(-1-1)(-2-9)\\\\=(-4)(1)(3)(-2)(-11)\\\\=-264\\\\f(-1)

Take x=2\in(-2,\frac{9}{2})\ as\ -2

f(2)=(2,-3)(2+2)(2+4)(2-1)(2\times2-9)\\\\=(-1)(4)(6)(1)(-5)\\\\=120\\\\f(2)>0

Hence f(x) for x=-1 and f(x)>0 for x=2

So f is sometimes positive and sometimes negative in the interval.

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3 years ago
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kati45 [8]

Answer:

The answer is D!

Step-by-step explanation:

hope this helps

3 0
2 years ago
Let the positive numbers a, b, c. Prove that <img src="https://tex.z-dn.net/?f=%5Cfrac%7Ba%5E%7B2013%7D%2Bb%5E%7B2013%7D%2Bc%5E%
Serggg [28]

Answer:

I don't need to prove it, I already believe you

7 0
2 years ago
What is the y interceot for f(x)=x^2-3
andre [41]

Answer: 0,-3

Step-by-step explanation: hope this helps!!

4 0
2 years ago
Read 2 more answers
If f(x)=-3x +2, find<br><br> c) x if f(x) = 0.
monitta

Answer:

f(0)=2

Step-by-step explanation:

f(x)=-3x +2

f(0)=-3(0) +2

f(0)= 0 +2

f(0)=2

4 0
2 years ago
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