Add or Subtract to simplify

Mathematics

1 answer:

Drupady [299]3 years ago

5 0

Answer:

3. - 8n² -8n + 3

Step-by-step explanation:

(4n^4 - 8n +4) - (8n² + 4n^4 +1)

Firstly, open the brackets.

= 4n^4 - 8n +4 - 8n² - 4n^4 - 1

Now, group like terms.

= 4n^4 - 4n^4 - 8n² -8n - 1 + 4

4n^4 - 4n^4 cancel out with each other since one is negative and the other is positive. So we're left with - 8n² -8n - 1 + 4

= - 8n² -8n - 1 + 4

= - 8n² -8n + 3

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What is the solution to this system of equations?<br> x = 12 − y<br> 2x + 3y = 29

Elenna [48]

Let’s arrange the fist equation
x+y=12
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Multiply equation 1 by 2
So it will be

2x+2y=24

Subtract eq 1 from eq 2

2x+3y=29
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—————-
Y =5

Put value of y in eq 1

2x+2y=24
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2x= 24-10
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x=14/2
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8 0

3 years ago

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