# Algebra -exponents

#### CSmith

##### Member
is this correct?
1.) 32 2/5

(32 1/5) ^2

=(5 SQUARE ROOT 32)2

=5(SQUAREROOT 2X2X2X2X2)2
=(5 SQUARE ROOT )2

=5 SQUARE ROOT 2 X 5 SQUARE ROOT 2
=25 (2 SQUARE ROOT 2)
=50 SQUARE ROOT 2

#### SuperSonic4

##### Well-known member
MHB Math Helper
is this correct?
1.) $32^{2/5}$

$(32^{1/5}) ^2$

=(5 SQUARE ROOT 32)2
$(\sqrt{32})^2$

=5(SQUAREROOT 2X2X2X2X2)2
$= (\sqrt{2 \cdot 2 \cdot 2 \cdot 2 \cdot 2})^2$
Notation aside you're correct up to here

=(5 SQUARE ROOT )2

=5 SQUARE ROOT 2 X 5 SQUARE ROOT 2
=25 (2 SQUARE ROOT 2)
=50 SQUARE ROOT 2
You've lost me here though. You have $(\sqrt{2^5})^2$ which is the same as $((2^5)^{1/5})^2$ which cancels down to $2^2$

A simpler way IMO is to note that $32 = 2^5$ (as you did). That leaves you with $(2^5)^{2/5} = 2^{5 \cdot 2/5} = 2^2$

Your notation is very tricky to follow. Please use Latex or "^" together with brackets next time to make it easer to follow.

#### Jameson

$$\displaystyle 32^{\frac{1}{5}}=2$$ because $2 \cdot 2 \cdot 2 \cdot 2 \cdot 2 = 32$.
So now we've applied the root and got 2. Now we apply the power and get $2^2=4$ and we're done. Again you can choose the order in which you calculate this so take a second to consider both options and choose the one that has the easier numbers to work with.