## anonymous one year ago help

1. anonymous

?

2. anonymous

|dw:1434415978932:dw|

3. jim_thompson5910

list out the factors of 20 1, 2, 4, 5, 10, 20 which factors are a perfect square?

4. anonymous

4

5. jim_thompson5910

so we can say $\Large \sqrt{20} = \sqrt{4*5}$ $\Large \sqrt{20} = \sqrt{4}*\sqrt{5}$ $\Large \sqrt{20} = 2*\sqrt{5}$

6. anonymous

ok

7. jim_thompson5910

do you see where to go from here?

8. anonymous

no lol

9. jim_thompson5910

|dw:1434416325773:dw|

10. anonymous

@peachpi

11. jim_thompson5910

|dw:1434416345748:dw|

12. jim_thompson5910

|dw:1434416363616:dw|

13. jim_thompson5910

so after that, the next step is |dw:1434416395563:dw|

14. anonymous

ohhh now i see

15. jim_thompson5910

think of the sqrt(5) as a variable, like x and you'll combine like terms (in a way)