# Math Help - square roots. stuck!!!

1. ## square roots. stuck!!!

those are the questions which i need help on. the first on i need to find the number which goes up the top and the rest i need to know what the answers are- but could u please explain it. thanks

2. ## Re :

(1) $\sqrt{8}=2.8282828$

(2) $\sqrt[3]{64}=4$

(3) $\sqrt[3]{-1}=-1$

(1) $\sqrt{8}=2.8282828$

(2) $\sqrt[3]{64}=4$

(3) $\sqrt[3]{-1}=-1$

how do i work it out???

4. 2.8282 * 2.8282 = 7.97.... also equals to 8
4 * 4 * 4 = 64
-1 * -1 * -1 = -1

5. i understand now thanks alot mate

6. no problem you just multiply the answer with the itself depending on the root.

(1) $\sqrt{8}=2.8282828$
$\sqrt{8} \approx 2.828427125$ or in simplest radical form as $\sqrt{4 \cdot 2}=2\sqrt{2}$