## anonymous 4 years ago Can someone help me with this equation? I'm trying but it's not coming out right.

1. anonymous

Find an exact solution for Then, find the approximate solution.

2. anonymous

start by "cross multiplying" to get $2(\sqrt{5}-1)=\sqrt{5}x$

3. anonymous

$x=\frac{2(\sqrt{5}-1)}{\sqrt{5}}$

4. anonymous

$2\sqrt{5}-2=\sqrt{5}x$ $x=\frac{2\sqrt{5}-2}{\sqrt{5}}$

5. anonymous

maybe you need to "rationalize the denominator" as well

6. anonymous

multiply and divide. You just have to keep track of things. It's better when you put parentheses on things when you do this.

7. anonymous

okay, i'll try again..

8. anonymous

I'm still getting an answer thats not on my choice list.. :/

9. anonymous

what are ur choices????

10. anonymous

a. 10-2 sqrt5/5; 1.1 b. 2-2sqrt5; -2.5 c. -2; 2 d. 2sqrt5-2/sqrt5; 1.1

11. anonymous

ya its d

12. anonymous

can you explain how you did and it got that answer please?

13. anonymous

see the first part of d has already been solved by satellite 73

14. anonymous

for 1.1,you can simply put the value of sqrt(5) and solve....

15. anonymous

Oh i see.. lol ty