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Math Help - Solving a System of Equations - TI calculator?

  1. #1
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    Solving a System of Equations - TI calculator?

    Hi,

    Quick question here - my teacher said that there is a method to check your answers when solving a system of equations (like below) on your TI-83/84 calculator but he hasn't showed how yet... I'm just wondering how because I want to check my answers...

    Example: A question like solve through comparison

    4x + 2y = -2
    2x - 3y = 1

    I got (0,1) but is there a way I can plug those two equations up there into my calculator just to see what the final answer is? I still need to work it out and whatever but it would greatly reduce the risk of making simple mistakes... well it would show me that I did make a mistake..
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  2. #2
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    Quote Originally Posted by ~NeonFire372~ View Post
    Hi,

    Quick question here - my teacher said that there is a method to check your answers when solving a system of equations (like below) on your TI-83/84 calculator but he hasn't showed how yet... I'm just wondering how because I want to check my answers...

    Example: A question like solve through comparison

    4x + 2y = -2
    2x - 3y = 1

    I got (0,1) but is there a way I can plug those two equations up there into my calculator just to see what the final answer is? I still need to work it out and whatever but it would greatly reduce the risk of making simple mistakes... well it would show me that I did make a mistake..
    method 1 ... get both linear equations in slope-intercept form, graph them both, and look for their intersection.

    method 2 involves matrices ... a bit difficult to explain here, so look in your owner's manual for details.
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