Question 118369
{{{3n^2 - 4m}}} Start with the given expression



{{{3(-2)^2 - 4(5)}}} Plug in {{{n = -2}}} and {{{m = 5}}}



{{{3(4) - 4(5)}}} Square -2 to get 4. Remember {{{(-2)^2=(-2)(-2)=4}}}



{{{12-20}}} Multiply 3 and 4 to get 12. Multiply 4 and 5 to get 20.



{{{-8}}} Subtract.



So {{{3n^2 - 4m=-8}}} when {{{n = -2}}} and {{{m = 5}}}