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san4es73 [151]
3 years ago
9

Can someone help with that?if x+y=2, calculate: P=4x (x-3)+4y(y-3)+8xy​

Mathematics
1 answer:
olganol [36]3 years ago
6 0

Answer:

Step-by-step explanation:

P = 4x(x - 3) + 4y(y - 3) + 8xy

  = 4x² - 12x + 4y² - 12y + 8xy

  = (4x² + 8xy + 4y²) - (12x + 12y)

 = 4(x² + 2xy + y²) - 12(x + y)

 = 4(x + y)² - 12(x + y)

x+y =2 ⇒ P = 4.2² - 12.2 = 16 - 24 = -8

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Y= 1/2x+ 2 to make the x the subject.
timofeeve [1]

Answer:

x=2y-4

Step-by-step explanation:

y=\frac{1}{2} x+2

"To make x the subject" means to have the equation with all the terms in x on one side. As of now, y is the subject of the equation.

You start by subtracting 2 from both sides, you should get the following.

y-2=\frac{1}{2} x

Then you multiply by 2 from both sides, you should end up with the following.

2(y-2)=x

Therefore, you get the following.

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Finally, you distribute and get the answer.

x=2y-4

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2 years ago
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marissa [1.9K]

Answer:

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Step-by-step explanation:

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3 years ago
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Answer:

62.5

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4 0
3 years ago
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podryga [215]

Answer:

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3 0
2 years ago
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Ede4ka [16]

Answer:

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