Question

CAN SOMEONE HELP ME PLEASE :( ? MEDAL+FAN

Answer 1

On what?

Answer 2

Simplify the radical below.

\[\sqrt{84}\]

Answer 3

First do a prime factorisation on 84.

Answer 4

84
2 X 42
2 X 2 X 21
2 X 2 X 3 X 7 <<< all prime

Answer 5

\[2\sqrt{42}\] would be the answer right

Answer 6

Nope. You move pairs of number out of the square root, like this.
\[
\begin{align*}
\sqrt{84}&=\sqrt{2\times2\times3\times7}\\
&=\sqrt{2\times2}\sqrt{21}\\
&=\sqrt{2^2}\sqrt{21}\\
&=2\sqrt{21}
\end{align*}
\]

Answer 7

:( i hate math why does it got be so difficult