Question

What should be added to x² + y² to get x² + y² - 8xy?​

Answer 1

Answer:

we add 2x² & 2y² get the answer.

Step-by-step explanation:

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Answer 2

Question:

What should be added to x² + y² to get x² + y² - 8xy?

Answer:

• Think (x² + y²) as 2
• Think (x² + y² - 8xy) as 5
• Think the missing number as x
• They say that x+2=5
• We know that the answer is 3
• How do we get that?
• We got that by subtracting 5 and 2
• 5-2=3
• The same formula we have to use in this question
• We have to subtract x² + y² from x² + y² - 8xy

$(x²+y²-8xy) - (x²+y²)$

${x}^{2} + {y}^{2} - 8xy - {x}^{2} - {y}^{2}$

${x}^{2} - {x}^{2} + {y}^{2} - {y}^{2} - 8xy$

• x² and -x² will be cancelled
• y² and -y² will be cancelled
• So, the remaining will be -8xy

Thus the answer is -8xy

$answer \: = (- 8xy)$

To check:

$( {x}^{2} + {y}^{2} ) + ( - 8xy) \\ = {x}^{2} + {y}^{2} - 8xy$

Thus we got the answer…

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