Which of the following expressions is equal to -3x^2-12??!!! please help him

Mathematics

1 answer:

Andreyy892 years ago

3 0

Answer:

-3 ( x+2i) (x-2i)

Step-by-step explanation:

-3x^2-12

Factor out a -3

-3(x^2 +4)

Rewrite

-3 ( x^2 - -4)

-3 ( x^2 - (-2i)^2) This is the difference of squares ( a^2 -b^2 ) = (a-b)(a+b)

-3 ( x- -2i) (x+2i)

-3( x+2i) (x-2i)

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Which of these logs is the greatest? I need to know how to figure this out for a math test tomorrow. Could someone explain the p

Charra [1.4K]

I just learned logarithm and I think the answer is B.
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So A is 60.
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So B is 64.
$C) 3 ^{x} = (3 ^{3} ) ^{20}$
So C is 60.
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So D is 60.
Then B is the biggest.

Thank you very much.
<span>(Took a lot of time of mine...) </span>

5 0

3 years ago

Use technology to construct an appropriate model of the data. (0,1), (1,-2), (2,-3), (3,-2), (4,1) f(x) = – x2 + 4 f(x) = x2 - 4

Marina CMI [18]

The answer choices tell you this is a parabola.
The given points tell you it opens upward and the vertex is (2, -3).
Your knowledge of the vertex form of the equation is the only "technology" that you need. The vertex form is
y = a(x - h)² + k . . . . . for vertex (h, k)
The fact that the y-value is 1 more than its vertex value when |x-2| = 1 tells you the scale factor "a" is 1.

You can write the model as
D. f(x) = (x -2)² - 3