First HP Calculator: basic use

It is my first graphic calculaot, so forgive me ignorance please.

When I go into the menu of CASES and I immediately want to simplify an equation or expression, how can I get the simplify() upward on the screen? (The only way I can make it work's first press a number as 1 in order to activate the cursor in the box, and then press BACKSPACE and press the increase).

How do I type an opening parenthesis, or a SINGLE closing paren without having to use () and then removing the extra parenthesis, I want? Too simplified example, if I type 2 + 2 and then decide to go back and put 2 + 2 in parentheses. I have to go to start, press (), then remove the supplement), then go to the end and press () and remove the extra (.)

How can I evaluate simple equations like x 8 = 16 so that x = 2? Now when I press ALPHA 8 (time) x, SHIFT (period) = 2 and press to enter. It rewrites only 8 * x = 2 on the screen. I'm expecting a x = 2 in response.

How to simplify (c ^ 3d ^ 5) ^ 2 * (cd ^ 3) ^ 3, then he gives me the right answer rather than rewrite the expression and then give me the right answer? (Right of reply: c ^ 9 ^ 19)

How can I make the proot() function returns accurate values? For example, proot (2y ^ 2 + 7y + 6) should return positive 3 and 4 positive, no - 2, and -1.5.

When I go into the menu of CASES and I immediately want to simplify an equation or expression, how can I get the simplify() upward on the screen? (The only way I can make it work's first press a number as 1 in order to activate the cursor in the box, and then press BACKSPACE and press the increase).

The trick is to first press the space key.  However, it is usually best to simply type the expression first of all, press ENTER, and then simplify the press.  In this way the unedited original expression is in the history so that you can tap it and re - use.

How do I type an opening parenthesis, or a SINGLE closing paren without having to use () and then removing the extra parenthesis, I want? Too simplified example, if I type 2 + 2 and then decide to go back and put 2 + 2 in parentheses. I have to go to start, press (), then remove the supplement), then go to the end and press () and remove the extra (.)

Method 1: Shift Vars (characters), then tap the bracket you want.

Method 2: (shift return) back for an opening parenthesis;  cursor - right back, for a closing parenthesis ().

How can I evaluate simple equations like x 8 = 16 so that x = 2? Now when I press ALPHA 8 (time) x, SHIFT (period) = 2 and press to enter. It rewrites only 8 * x = 2 on the screen. I'm expecting a x = 2 in response.

Type this: solve (8 * x = 16)

Suggestion: Tap box tool, the CASES tab, solve, and then explore this menu by highlighting one of the Solve funstions and press the help key.  There are a lot of powerful options it.

How to simplify (c ^ 3d ^ 5) ^ 2 * (cd ^ 3) ^ 3, then he gives me the right answer rather than rewrite the expression and then give me the right answer? (Right of reply: c ^ 9 ^ 19)

First of all, to avoid the "implicit multiplication.  Since variables can have more than one letter, the first cannot know you mean c * d when you type cd.  He thinks you mean a variable called "cd".

Your example should be typed as (c ^ 3 * d ^ 5) ^ 2 * (c * d ^ 3) ^ 3.  Prime simplifies correctly as.

How can I make the proot() function returns accurate values? For example, proot (2y ^ 2 + 7y + 6) should return positive 3 and 4 positive, no - 2, and -1.5.

Your example solves 2y ^ 2 + 7y + 6 = 0.  Premium solutions are correct:

* (- 1.5) 2 ^ 2 + 7 + 6 = 0 *(-1.5)

*(-2) 2 ^ 2 + 7 + 6 = 0 *(-2)

2 * 3 ^ 2 + 7 * 3 + 6 = 45

2 * 4 ^ 2 + 7 * 4 + 6 = 66

Another approach: factor(2y^2+7y+6).  First returns (y + 2) *(2*x+3).  As you can see, defining each factor equal to zero gives the first solutions given above (-1.5 and -2).

Hope that helps!

Tags: HP Tablets

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