Expand the expression (2m+15)(-m-3)

 Exercise

$\left(2m+15\right)\left(-m-3\right)$

 

Multiply the single term $-m-3$ by each term of the polynomial $\left(2m+15\right)$

$2m\left(-m-3\right)+15\left(-m-3\right)$

 

Multiply the single term $2m$ by each term of the polynomial $\left(-m-3\right)$

$-2m\cdot m-6m+15\left(-m-3\right)$

 

When multiplying two powers that have the same base ($m$), you can add the exponents

$-2m^2-6m+15\left(-m-3\right)$

 

Multiply the single term $15$ by each term of the polynomial $\left(-m-3\right)$

$-2m^2-6m-15m-45$

 

Combining like terms $-6m$ and $-15m$

$-2m^2-21m-45$

$-2m^2-21m-45$

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