Question

What should be taken away from this?​

Answer 1

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What should be taken away 4x² - 4y² + 5xy + 20 to obtain 2x² - y² + 4xy + 30?

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(4x² - 4y² + 5xy + 20) - (2x² - y² + 4xy + 30)

4x² - 4y² + 5xy + 20 - 2x² + y² - 4xy - 30 -- ( as there was negative operation before the breacket, the signs inside the bracket changed)

4x² - 2x²- 4y² + y² + 5xy - 4xy + 20 - 30 -- (putting like terms together)

2x² - 3y² +xy - 10

∴ 2x² - 3y² +xy - 10 should be taken away 4x² - 4y² + 5xy + 20 to obtain 2x² - y² + 4xy + 30

✬ NOTE -

To solve a question easily, first just analyse what the question demands for and then start for your answer.

Hope this helps uh! ♡