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Addition and Subtraction of Algebraic Expression

Subtract the ...

Question

Subtract the following :
$3 m^{2} - 2 + 1 m$ from $m^{3} - 9$

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Solution

$(m^{3} - 9) - (3 m^{2} - 2 + 1 m)$
$= m^{3} - 9 - 3 m^{2} + 2 - m$
$= m^{3} - 3 m^{2} - m - 7$

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