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nekit [7.7K]
4 years ago
15

Solve the equation !!!! HELP PLEASE

Mathematics
1 answer:
elena-14-01-66 [18.8K]4 years ago
6 0

Answer:

x=-1/2

Step-by-step explanation:

Given:

8x^3+12x^2+6x+1=0

Making factors of the given polynomial by using cube formula, given as

(a + b)^3 = a^3 + 3a^2b + 3ab^2 + b^3

Re-writting the given polynomial:

(2^3.x^3) + 3(2^2.x^2)(1)+3(2x)(1) + (1^3)=0

Hence (2^3.x^3) + 3(2^2.x^2)(1)+3(2x)(1) + (1^3) can be written as (2x+1)^3

(2x+1)^3= 0

2x+1= 0

2x= -1

x= -1/2 !

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emmasim [6.3K]
I think it’s 3 not sure!
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2 years ago
Bryan needs to build a fence around his rectangular vegetable garden. The length will be 2 feet longer than the width. If he use
GalinKa [24]
In order to do this, one side of the rectangle will be x+2, and the other will just be x. The x would be representing the width since the length is the width (x) plus two feet (+2). Next, you have to make an equation. So, since it all has to use 16 feet of fencing, you would set the two sides to be added to equal 16. So, it would be: 16=x+2+x. Then, you reduce that, so it would be: 16=2x+2. After that you just solve for x (which means that you want x by itself on one side of the = ). So, you would subtract 2 from both sides. Since 2-2=0, that would make the "+2" go away; since 16-2=14, that would replace the 16. So, your new equation is: 14=2x. After that you just divide both sides by 2 because 2 divided by 2=0. 14/2=7. So, you would end up getting: 7=x as your final answer.

Now, you just put 7 where x was in the sides. So 2x (which was the length) trims into: 2 times 7, which =14 and the x (which was the width) we already figured out was 7. This, the width would be 7, while the length would be 14.
5 0
3 years ago
Find the area of a face of a rectangular prism.
Andru [333]

Answer:

It is L*W*H.

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Step-by-step explanation:

I don't know what you are exactly talking about, there are no attached worksheet. But if you are talking about the formula for the rectangular prism.

Formula for rectangle prism: L*W*H

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5 0
4 years ago
If f(x)=7x and g(x)=6x-3,find (f*g)(x)
Dovator [93]
(f\cdot g)(x)=f(x)\cdot g(x)\\\\
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7 0
4 years ago
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Alexandra [31]
Hello!

I believe n=13

You can find the answer by adding 1, 2, and 3 together to get 6. You then divide 78 by 6 to get 13. You can also substitute n w/ 13 and solve the equation from there to check your answer.

I hope this helps!
8 0
3 years ago
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