Torrayani<3
4. If f(x) = 4x + 1 and g(x) = −x − 2, find (f + g)(−1).



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zaynahf
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What (f+g)(1) means is to add up the two binomials first f(x)+g(x), and then substitute 1 for x. What do you get when you do:
4x+1x2

Torrayani<3
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5x=3???

zaynahf
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There's no = sign, just simplify it by adding like terms:
First do 4xx, and then 12

Torrayani<3
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3x 1?

Torrayani<3
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@zaynahf

zaynahf
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Good.. now just substitute 1 for x

Torrayani<3
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so it's going to be 1x or 3x

zaynahf
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No, because you are substituting something for x, there will be no more x. Do this: 3(1)1

Torrayani<3
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4!!

zaynahf
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Yep! You got it!

Torrayani<3
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thank you please come to my next post!

zaynahf
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Sure..