Question

5y²=100
how do you work this out

Answer 1

y=2

Step-by-step explanation:

You first square root both sides to get rid of the second power on the left side.

It would look like this..

`\sqrt{5y { }^(2) } = √(100)`

After this, the second power is canceled out and the square root of 100 is 10. The equation should look like this.

`5y = 10`

Next, divide both sides by 5.

5y/5= y.

10/5= 2.

`y = 2`

Answer 2

Answer: 2√5

Step-by-step explanation:
Divide 5 on both sides.
5y²=100
y²=20

Then square root both sides. (The opposite of ² is square root)

y²=20
y=√20

Now simplify it:

y=√20
y=√4 * 5
y=√4 *√5
y=2√5