## ChristaB 3 years ago 1/2a^2 - 1/4a For a=4

1. lgbasallote

substitute a with 4....where are you confused tehre?

2. ChristaB

1/2(4)^2 - 1/4(4) 1/2 (16) - 1/4(4) 16/2- 4/4 ???

3. lgbasallote

that depends... is the question $\frac 12 a^2 - \frac 14a$or$\frac 1{2a^2} - \frac 1{4a}$

4. ChristaB

its 1/2a2 - 1/4a

5. lgbasallote

?

6. ChristaB

a^2

7. lgbasallote

a^2 = $$a^2$$

8. ChristaB

I am working on polynomials. The question says to "Evaluate the expression" 1/2a^2 - 1/4a For a= 4

9. lgbasallote

and i am asking you how the question looks like...

10. ChristaB

How do you get your equation to look like a real exponent on here?

11. lgbasallote

is the a in the denominator or not?

12. lgbasallote

is it $\huge \frac 12 a^2 - \frac 14a$ or $\huge \frac 1{2a^2} - \frac 1{4a}$

13. ChristaB

no, it is to the side of the of the fraction

14. lgbasallote

then you're right

15. ChristaB

Got it.... thank you- but seriously. how did you type out the equation like that on the computer

16. lgbasallote

do you see that box that says $\huge \boxed{\sum \; \rm{Equation}}$

17. lgbasallote

below the comment box

18. ChristaB

yes

19. ChristaB

oh.. cool.. thank you

20. lgbasallote

welcome