Question

Solve for b. (sqrt[b^4/25] = 4)

Answer 1

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

Answer 2

square on both sides..

Answer 3

\[B ^{4}/25 = 4^2\]

Answer 4

\[b ^{4}/25 = 16\]

Answer 5

ok now simplify!

Answer 6

\[\LARGE \sqrt{\frac{b^4}{25}}=4\]
\[\LARGE \frac{\sqrt{b^4}}{\sqrt{25}}=4\]
\[\LARGE \frac{b^2}{5}=4\]
\[\LARGE b^2=20\]
\[\LARGE b=?\]

Answer 7

or you could do it that way :D..

Answer 8

is the same :) ..

Answer 9

find the sqrt of both sides. B and 4.47
B = 4.47?

Answer 10

\[\LARGE b^2=20\]
\[\LARGE b=\pm\sqrt{20}\]
\[\LARGE b=\pm\sqrt{4\cdot 5}\]
\[\LARGE b=\pm2\sqrt{5}\]

Answer 11

A. 2
B. \[\pm5\sqrt{2}\]
C. 3
D. \[\pm2\sqrt{5}\]