## P.nut1996 2 years ago Help please? Let f(x) =x+7 and g(x) =x–2. What is f(x)•g(x)?

1. P.nut1996

\[A. x ^{2}-5x+14\]

2. P.nut1996

\[B. x ^{2}+5x-14\]

3. Goten77

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4. RD⁴²

If f(x) =x+7 and g(x) =x–2 then f(x)•g(x) = (x+7)(x-2) Do FOIL or box method.

5. P.nut1996

\[C. x ^{2}+5x-5\]

6. P.nut1996

\[D. x ^{2}+9x+5\]

7. RD⁴²

What does (x+7)(x-2) equal?

8. Goten77

if those are you only multiple choices then just by looking at them we can decide which 1 is the only possible answer.... look at the ending constant

9. P.nut1996

\[(x+7)(x-2)= x ^{2}-2x+7x-14=x ^{2}+5x-14\]

10. P.nut1996

I got x^2+5x-14

11. RD⁴²

Well done!

12. P.nut1996

Thanks!

Understand "composite" functions. This is more than just FOIL

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15. RD⁴²

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OH, since it was such a large "dot" I thought maybe it was "composite" "FOILed again" lol

18. RD⁴²

haha

Sorry about that @P.nut1996 stick with RD42

20. P.nut1996

Thank you so much guys! Very helpful! :D