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We are asking what number, times itself, is equal to 30. Five times itself is 25. Six times itself is 36. The answer is somewhere between 5 and 6. Let's split the difference and try 5.5. 5.5 times 5.5 is 30.25. This is above 30, so let's try a smaller number, 5.4. 5.4 times 5.4 is 29.16. This is lower than 30, so we need a higher number. How about 5.45? I get 29.7025. We need a number a little higher. How about 5.47? I get 29.9209. Still need a little higher. How about 5.48? 30.0304. So it is somewhere between 5.47 and 5.48.

On a calculator, you can use the square root function. Sometimes you have to enter the number before you hit the square root function and sometimes you need to enter the number after hitting the square root function. Another way of doing it is to use the exponent function, usually with a y to the x key or a ^ key. Enter 30, hit the exponent key, and then enter 1 divided by 2 in brackets.

I get approximately 5.477225575051661134569697828008.

Good luck.

Paul

Posted on Mar 29, 2015

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Posted on Jan 02, 2017

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Press

3 . 2 8 / 2nd [square-root] 5 0 . 4 2 ) =

"/" is the divide key. "square-root" is the shifted function of the square key to the left of the 7 key.

3 . 2 8 / 2nd [square-root] 5 0 . 4 2 ) =

"/" is the divide key. "square-root" is the shifted function of the square key to the left of the 7 key.

Aug 09, 2011 | Texas Instruments TI-30 XIIS Calculator

Use the square root function, which the second function of the x^2 key located just to the left of the 7 key. For example, to calculate the square root of 2, press 2nd [square-root] 2 ) =

Jul 23, 2011 | Texas Instruments TI-30 XIIS Calculator

Press 2nd [square-root], enter the number, press ) =

For example, to calculate the square root of 5, press 2nd [square-root] 5 ) =

For example, to calculate the square root of 5, press 2nd [square-root] 5 ) =

May 07, 2011 | Texas Instruments TI-30 XIIS Calculator

The square-root key must be pressed before the number. Press 2nd [square-root] 3 ) = and you should get about 1.73 (depending on the current display format).

Feb 18, 2011 | Texas Instruments TI-30 XIIS Calculator

To calculate the square root of 9, press

2nd [square-root] 9 ) =

The square-root is the shifted function of the x-squared key, just to the left of the 7 key. The close-parenthesis is needed to balance the open-parenthesis automatically inserted by the square-root function.

2nd [square-root] 9 ) =

The square-root is the shifted function of the x-squared key, just to the left of the 7 key. The close-parenthesis is needed to balance the open-parenthesis automatically inserted by the square-root function.

Feb 16, 2011 | Texas Instruments TI-30 XIIS Calculator

2nd [square-root]

The 2nd is the shift key at the upper-left corner of the screen. The square root is the shifted function of the x^2 key, just to the left of the 7 key.

The 2nd is the shift key at the upper-left corner of the screen. The square root is the shifted function of the x^2 key, just to the left of the 7 key.

Jan 11, 2011 | Texas Instruments TI-30 XIIS Calculator

Use the square-root function, which is the shifted function of the x^2 key just to the left of the 7 key.

For example, to find the square root of 2, press 2nd [square-root] 2 ) =

For example, to find the square root of 2, press 2nd [square-root] 2 ) =

Nov 23, 2010 | Texas Instruments TI-30 XIIS Calculator

Square root is the 2nd function of the square key, to the left of the 7 key. To compute the square root of 62, press 2nd [square-root] 6 2 ) =

Nov 15, 2010 | Texas Instruments TI-30 XIIS Calculator

Use the square root function. It's the second function of the square key, just to the left of the 7 key.

May 03, 2010 | Texas Instruments TI-30 XIIS Calculator

If you can't find the square root sign you could enter it like:

4^(1/2)=2 and 16^(1/2)=4 just what #your look for the square root of just take to the ^(1/2)

I'd like to give the key reference for the square root sign but, I loan my calculator to a student

4^(1/2)=2 and 16^(1/2)=4 just what #your look for the square root of just take to the ^(1/2)

I'd like to give the key reference for the square root sign but, I loan my calculator to a student

Sep 25, 2009 | Texas Instruments TI-30 XIIS Calculator

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