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12-05-2017
Mathematics

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(-4w²-9n) - (-15w²)
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12-05-2017

(-4w² - 9n) - (-15w²)
Treat the minus sign in the middle as if it's -1 and distribute.
(-4w² - 9n) -1(-15w²) = (-4w² - 9n) +15w²

Take out parentheses -4w² - 9n +15w²
Combine like terms. Two of these terms have a w² so we put them together

11w² - 9n
That's as simplified as it could get

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