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Mathematics 6 Online
OpenStudy (anonymous):

Given that f(x) = x² + 5x, evaluate f(-2).

hartnn (hartnn):

to get f(-2), just plug in x=-2 in f(x) !

OpenStudy (anonymous):

what is the answer tho thats wat i cant get

hartnn (hartnn):

ok, (-2)^2 + 5 (-2) =... ? can you find ?

OpenStudy (anonymous):

no

hartnn (hartnn):

what is -2 * -2 = ... ?

OpenStudy (anonymous):

)Plug in -2 for in every place where there is a "x" on the right of the equation (-2^2)+(-2*5) then solve, 4 + -10=.6 Post answer once you find it.

OpenStudy (anonymous):

4

OpenStudy (anonymous):

Not 4, try again.

OpenStudy (anonymous):

is it 6

OpenStudy (anonymous):

Oh, 4 to my question or Hart's?

hartnn (hartnn):

you mean -2*-2 = 4 thats correct now whats 5*-2 = .. ?

OpenStudy (anonymous):

is it 6

hartnn (hartnn):

final answer is NOT 6

OpenStudy (anonymous):

-6

hartnn (hartnn):

yes!

OpenStudy (anonymous):

Yes, great job!

OpenStudy (anonymous):

thank u

OpenStudy (anonymous):

Np, thanks Hart.

hartnn (hartnn):

welcome ^_^

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