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Mathematics 21 Online
OpenStudy (anonymous):

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OpenStudy (anonymous):

@iambatman

OpenStudy (anonymous):

Given f(x)=2x^2+8 and g(x)=5x -6

OpenStudy (anonymous):

please solve this

OpenStudy (anonymous):

(2x^2+8)+(5x -6 )

OpenStudy (anonymous):

What do I do do I multiply 2x and 5x?

OpenStudy (anonymous):

no. 2x^2 and 5x ar not lik terms because they do not have same power of x

OpenStudy (anonymous):

Do I need a graphing calculator to solve this?

OpenStudy (anonymous):

Oh.

OpenStudy (anonymous):

now the answer will be \[ 2x^2+ 5x +2\]

OpenStudy (anonymous):

(f+g)(x)= f(x)+g(x) = 2x^2 +8 + 5x-6 = 2x^2+ 8 +1

OpenStudy (anonymous):

Oh. . . How confusing it shows it this way in the book.

OpenStudy (anonymous):

2x^2+ 8 +1 is very wrong

OpenStudy (anonymous):

Ahh. . . Okay then. I will follow your lead, what's next?

OpenStudy (anonymous):

i have given the answer to that

OpenStudy (anonymous):

Oh okay. I will try the second one on my own you tell me if it's correct.

OpenStudy (anonymous):

2x^2*5x+2

OpenStudy (anonymous):

you there?

OpenStudy (anonymous):

\[(2x^2+8)(5x -6 ) =\]

OpenStudy (anonymous):

\[2x^2*5x -2x^2*6 +5x*8-8*6\]

OpenStudy (anonymous):

\[10x^3-12x^2+40x-48 \]

OpenStudy (anonymous):

that would be the answer

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