Question about Casio FX-115ES Scientific Calculator

# How do I factor on my casio Fx115es

I am trying to problems like :
8s squared -30s+18
and
8xcubed+125 *2x+10 over
2x squared -50*8x squared -20x+50
what function do I need to put it on and how do I imput it so it will work?

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• Casio Master

Support.casio.com/pdf/004/fx-115ES_991ES_Eng.pdf -
It is all explained in the above manual.

Posted on May 09, 2010

• 1 more comment
• Julie Storey Jan 31, 2012

I have the manual. I am can't get it still.

• Julie Storey Jan 31, 2012

oops - and I still can't get it.

• Julie Storey Jan 31, 2012

I am trying to solve radicals under the square root sign that have variables in them. (and no, and I definitely not a Math whiz)

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## Related Questions:

### How do I get all the factors of a constant using my calculator?

There is a program on page 253 of the manual (http://support.casio.com/manualfile.php?rgn=5&cid=004002013) to get the prime factors of any number. You could modify the program to get all the factors.

Another way would be to do it manually. I start with the number 1 and go up to the square root of the number. The square root of 120 is 10.95, so let's go up to 11. Using 120 as an example:

120 /1 = 120 thus factor is (1, 120)
120/2 = 60 thus factor is (2, 60)
120/3 = 40 thus factor is (3, 40)
120/4 = 30 thus factor is (4, 30)
120/5 = 24 thus factor is (5, 24)
120/6 = 20 thus factor is (6, 20)
120/7 = 1.7 thus 7 not a factor
120/8 = 15 thus factor is (8,15)
120/9 = 13.3 thus 9 is not a factor
120/10 = 12 thus factor is (10,12)
120/11 = 10.9 thus 11 is not a factor.

Good luck.

Paul

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### I try to find LCM but keep getting error

I do not think that the FX115ES can give you the prime factor decomposition of a number. The FX115ES Plus may do it.
On the FX991 ES Plus there is key marked FACT.. It is the one between the Change sign key (-) and the HYPerbolic key.
I am afraid you will have to do the decomposition of the two numbers by hand. For example
1440=(2^5)(3^2)(5)
700=(2^2)(5^2)(7)
By multiplying the two number you can get a multiple of both but it won't be the smallest.
What you do is scan the two decompositions to identify the various prime factors, 2,3,5, 7
All those factors must be present in the LCM. For each prime factor, select the largest exponent . This is going to be 5 for factor 2, 2 for factor 3, 2 for factor 5, and 1 for factor 7
Hence LCM(1440,700)= (2^5)(3^2)(5^2)(7^1)=50400
Verify that 50400/1440=35 and 50400/700=72

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### Future value

The calculator does not have a TVM function/feature.

Aug 19, 2014 | Casio FX-115ES Scientific Calculator

### Square feet converted to square metres

Simply square the conversion factor between feet and metres to get the conversion factor between square feet and square metres.

One foot is 0.3048 metres, so squaring that gives one square foot is 0.09290304 square metres.

Aug 20, 2013 | Casio Brand New-Fx-991es Plus - Scientific...

### How do i remove MATH deplay on my Casio FX115ES

Press [SHIFT][MODE] to enter (SetUp). Select [2:LineIO] and you will be rid of the MATH Input/Output. You will lose some nifty features, like the stacked fractions, the radicals, but that is your choice.

Cheers.

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### Casio calculator fx115es inverse key not working consistently

The inverse sine is defined only for numbers in the range [-1, +1].
The sine of a number is at most 1.0. There is no number whose sine is 1.5, which is what you're asking for.
The same applies to the cosine and inverse cosine.

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### My calculator casio fx-350ES doesn't have equation.why? or this calculator doesn't have software equation.why?

Not all calculators have that. The Fx115ES and the FX991 ES have a lot more options thatn the FX300Es and FX350ES. I believe you only have COMP (general computational mode), Table and STAT.
Why? It was not designed that way.

Aug 18, 2011 | Casio FX-115ES Scientific Calculator

### How to work a casio fx115es calculator

To clear the display, press the AC button. To enter powers press the power key, labeled x with a raised small solid square. To use it enter the number: if the screen displays x with a dark square enter the exponent in the raised square. If the display shows a ^, enter exponent after the caret ^. Close any parentheses by entering the matching right parenthesis.

Apr 17, 2010 | Casio FX-115ES Scientific Calculator

### Weather casio FX-115ES can solve 5*5 matrix

According to the manual for the Casio FX115ES, the largest matrix it solves is a 3x3.

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