## xbrittxcheerx92x one year ago Simplify and write answer in exponential form: 3^3 + 2 • 3^3

1. Kitt020912

$3\times3\times3+2\times3\times3\times3$

2. xbrittxcheerx92x

My professor's answer was 3 x 3^3 but idk how she got that

3. tkhunny

Factor this: A + 2A

4. xbrittxcheerx92x

3A

5. tkhunny

Now try $$(3^{3} + 2\cdot 3^{3})$$ Hint: It is EXACTLY the same.

6. xbrittxcheerx92x

I'm sorry, but I still don't understand this.. :(

7. satellite73

one apple and two apples are three apples one $$3^3$$ and two $$3^3$$ are three $$3^3$$ and $$3\times 3^3=3^{1+3}=3^4$$

8. satellite73

if your professor really wrote $3\times 3^3$ he/she was not paying attention

9. ZeHanz

Try to see it this way: you have: 3^3 + 2 • 3^3, so this is 1 • 3^3 + 2 • 3^3 = 3 • 3^3 (you have 3 times 3^3). Last step: 3 • 3^3 = 3 • 3•3•3 = 3^4 (=81, I fail to see why you would stop after writing it as 3^4, just calculate the outcome...)

10. xbrittxcheerx92x

Omg! Thank you! That helped :)

11. ZeHanz

YW!