## anonymous one year ago Which expression is equivalent to (82)−4?

1. anonymous

is this supposed to be a multiple choice question?

2. Astrophysics

That's just 82-4..

3. anonymous

Yes

4. anonymous

how can I show the answers?

5. Astrophysics

We don't need them, |dw:1435183960425:dw|

6. Astrophysics

Do you know how to subtract?

7. anonymous

(8^2) -4 is the question

8. Astrophysics

Oooh!

9. anonymous

yes I do

10. anonymous

what's 8 squared

11. Astrophysics

$(8^2)-4 \implies 8 \times 8 - 4$

12. Astrophysics

$8^2 = 8 \times 8$

13. anonymous

so it would be 8^2 ?

14. Astrophysics

What?

15. Astrophysics

I'm saying 8^2 is 8 times 8

16. Astrophysics

x^2 = x * x

17. anonymous

its a multiple choice question with A,b, c, and d

18. Astrophysics

I don't care about the multiple choice

19. anonymous

do you know what 8 times 8 is??

20. anonymous

yes

21. Astrophysics

Just answer the question what is $8 \times 8 -4$

22. anonymous

60

23. Astrophysics

Yeah, that's it.

24. anonymous

thank you

25. Astrophysics

Just remember this, if you see something squared, cubed, what ever, it just means that it's being multiplied by itself by the amount of the exponent.

26. anonymous

hmm.. thank you for your help (:

27. Astrophysics

So $8^5 \implies 8 \times 8 \times 8 \times 8 \times 8$

28. Astrophysics

Np :P

29. anonymous

(82)−4? 82 x -4