Question

What must be added to
2x² - 3 xy + 5yz to get x² - xy + y²​

Answer 1

• -x² + y² + 2xy - 5yz

Explanation:

"A" must be added to first expression to get the second one:

• A + 2x² - 3 xy + 5yz = x² - xy + y²​
• A = ?

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• A = x² - xy + y²​ - (2x² - 3 xy + 5yz) =
• x² - xy + y²​ - 2x² + 3 xy - 5yz=
• -x² + y² + 2xy - 5yz