## need_help! 3 years ago Find \sqrt{(-4x+5)^2}

1. need_help!

$\sqrt{(-4x+5)^2}$

2. pigrenex

the answer is (-4x + 5)

3. need_help!

Actually I remember something with absolute value.. My question is: Is it like this |-4x+5| or |4x+5| ?

4. pigrenex

the square root and the exponent 2 are vanish

5. satellite73

i think you are right, it would be $$|-4x+5|$$

6. pigrenex

idk, because if you multiply both equations, the answer is the same. (-).(-) = (+)

7. pigrenex

you could write $\pm(-4x + 5)$

8. need_help!

Yes, maybe.. I went to wolfram to check, got something weird http://www.wolframalpha.com/input/?i=sqrt%7B%28-4x%2B5%29%5E2%7D+++ :P Haha, thank youuuu =)

9. pigrenex

but, satelite73 is not wrong. I think you can use both answers

10. need_help!

Actually YES! Satellite is absolutely right :) |4x+5| is wrong. Thank you pigrenex!