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2 years ago

Which of the following equations is equal to -x^2-4?

Mathematics

2 answers:

Contact [7]2 years ago

6 0

The correct answer is b

Alenkinab [10]2 years ago

4 0

Definitely not D, because one of the x's needs to be negative, and the other should be positive so the x will end up negative when it is multiplied.
I want to say the answer is C. (-x-2i) (x-2i)
Hope this helps :)

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Given the polynomial 2x3 + 18x2 − 18x − 162, what is the value of the coefficient 'k' in the factored form?2x3 + 18x2 − 18x − 16

s344n2d4d5 [400]

Answer:

$k=3$

Step-by-step explanation:

Let

$f(x)=2x^3+18x^2-18x-162$

We factor 2 to obtain;

$f(x)=2(x^3+9x^2-9x-81)$

We factor the polynomial within the parenthesis by grouping.

$f(x)=2(x^2(x+9)-9(x+9)$

$f(x)=2(x^2-9)(x+9)$

$f(x)=2(x^2-3^2)(x+9)$

We apply difference of two squares on the second factor: $x^2-3^2=(x-3)(x+3)$

$f(x)=2(x+3)(x-3)(x+9)$

We now compare to;

$f(x)=2(x+k)(x-k)(x+9)$

It is now obvious that $k=3$

6 0

2 years ago

Find the width of a rectangular prism if the volume is 77,680 cm^3, the length is 43 cm, and the height is 94.4 cm.

Lapatulllka [165]

Set the formula. length x width x height = Volume and solve for whichever

6 0

2 years ago

Arturiano [62]

Answer: C

Step-by-step explanation:

We know the scale factor is 6/2=3.

A) False. The ratio of the side lengths, not the areas, is 1 to 3.

B) False. Rectangle B is larger than Rectangle A.

C) The square of the ratio of the side lengths is the ratio of the areas.

D) False. The ratio of the side lengths, not the areas, is 1 to 3.

3 0

1 year ago

-9-2+4 = 90<br> (Absolute value)

elena-14-01-66 [18.8K]

Answer:

[90]

Step-by-step explanation:

3 0

2 years ago

10+200+0=——— what can you do with this

musickatia [10]

Answer:

210

Step-by-step explanation:

you can do 200 + 10 = 210

You can also do 200 + 1 x10

5 0

2 years ago

Read 2 more answers