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22 February, 17:02

How much greater than m^2+3mn-n^2 is 4m^2+5mn+6n^2?

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  1. 22 February, 17:26
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    3m² + 2mn + 7n²

    Step-by-step explanation:

    subtract m² + 3mn - n² from 4m² + 5mn + 6n², that is

    4m² + 5mn + 6n² - (m² + 3mn - n²)

    = 4m² + 5mn + 6n² - m² - 3mn + n² ← collect like terms

    = 3m² + 2mn + 7n²
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