# 20 Most Recent Texas Instruments TI-86 Calculator Questions & Answers

There is no solution for old age. Get a newer calculator.

Texas... | Answered on May 28, 2018

There is a way to do it. I believe you go into "complex" or "math" buttons. These buttons are yellow on the calculator. Therefore, to access them you must hit "2nd" then the button.

Better yet, you can also get around this dilemma another way. You can enter "the cubed root of x" by raising x to 1/3.

For example the cubed root of x = x^(1/3). It is best to place parentheses around 1/3 so the calculator knows exactly what you mean.

Another example, the "cubed root of (x + 1)" can be entered by:
(x+1)^(1/3) Note the parenteses around both (x+1) and (1/3). This applies if the radical cover both "x" and "1".

Hope this helps.

Texas... | Answered on Feb 07, 2018

The - key is for subtraction, an operation that needs two numbers. If you press - as the first key on a line, the calculator assumes you want to subtract something from the previous answer, Ans.

If you want to enter a negative number, use the (-) key on the bottom row of the keyboard, just to the left of the Enter key.

Texas... | Answered on Aug 18, 2016

See images below

Texas... | Answered on May 03, 2016

Hello,
There is a relation between roots and fractionary powers.

2nd root (square root) of X = X^(1/2) power 1/2
3rd root (cubic root) of X = X^(1/3) power 1/3
4th root of X = X^(1/4)
...
n-th root of X = X^(1/n)

Use the raise to arbitrary power key labeled as a caret [^] or [X to the y] or [Y to the x]
Hope it helps.

Texas... | Answered on Dec 13, 2015

83/360 is already reduced to lowest terms since 83 and 360 have no factors in common (other than 1).

Texas... | Answered on Nov 07, 2014

Just divide the numerator by the denominator. For example, to convert 1/4 to decimal, press 1 / 4 ENTER and see .25

Texas... | Answered on Sep 15, 2014

Every time you change batteries this will happen to you. First press 2nd then press and hold the down arrow. Hold until their is no black in the background but you can still see the numbers on the screen.

Texas... | Answered on Sep 05, 2014

You can type in an x-variable by pressing the x-var key.
For other graph types, the variables r, theta, t, can be enter by pressing the appropriate function key. from the graph equation entry screen.

Texas... | Answered on Aug 28, 2014

Error 07 Syntax
Means you made a typing error while entering the equation. Using the minus sign instead of the negation sign (change sign) (-), can produce a syntax error. Maybe you need to explicitly type the multiplication sign
y= (-) 1.5*x +3
Try entering it as 3 - 1.5*x

Texas... | Answered on Aug 28, 2014

Error 07 Syntax
Means you made a typing error while entering the equation. Using the minus sign instead of the negation sign (change sign) (-), can produce a syntax error. Maybe you need to explicitly type the multiplication sign
y= (-) 1.5*x +3
Try entering it as 3 - 1.5*x

Texas... | Answered on Aug 28, 2014

Error 07 Syntax
Means you made a typing error while entering the equation. Using the minus sign instead of the negation sign (change sign) (-), can produce a syntax error. Maybe you need to explicitly type the multiplication sign
y= (-) 1.5*x +3
Try entering it as 3 - 1.5*x

Texas... | Answered on Aug 28, 2014

Hello Sir/Ma
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Have you had problems with your bank and they have refused giving you a loan?? Do you have bad credits?? Consider all these no problem .An organisation with Approved Lending Institution Status under Section 156 of the Housing Act 1985 as amended by the Housing and Regeneration act 2008.For more enquiries.

Texas... | Answered on Jun 12, 2014

Press 3 2nd MATH F5 MORE F4 9 1 . 0 5 3 ENTER
or
press 9 1 . 0 5 3 ^ ( 1 / 3 ENTER

Texas... | Answered on Jun 12, 2014

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