Question

I need help with one more question pleaseee!!

Answer 1

\[\sqrt{b^4/25} =4\]

Answer 2

i have to try and solve for b :s

Answer 3

does it help to know that \(\large \sqrt{\frac{b^4}{25}}=\frac{b^2}{5}\) ?

Answer 4

yes that helps alot

Answer 5

don't forget that you are going to get two answers

Answer 6

do i have to do a Quadratic Formula?

Answer 7

oh no much easier than that!

Answer 8

\[\large \frac{b^2}{5}=4\iff b^2=20\]

Answer 9

i guess i should ask first is the square root over the whole fraction, or just in the numerator
wasn't quite clear

Answer 10

\[\large \sqrt{\frac{b^2}{25}}=4\] is what i was reading
is that right?

Answer 11

its just the numerator ?

Answer 12

yes thats right

Answer 13

wait b^4

Answer 14

that is what i was asking
is it \[\large \sqrt{\frac{b^2}{25}}=4\] or is it
\[\large \frac{\sqrt{b^4}}{25}=4\]

Answer 15

the second one

Answer 16

ok that is different
if
\[\frac{\sqrt{b^4}}{25}=4\] then
\[\sqrt{b^4}=100\]so
\[b^2=100\]

Answer 17

you solve that in your head, no quadratic formula
just make sure to write two answers

Answer 18

ok i got it! thanks c:

Answer 19

yw