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Junior Cert Maths equation help

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  • 15-01-2018 8:00pm
    #1
    Mrsmum
    Registered Users Posts: 1,860 ✭✭✭


    I would really appreciate if anyone could explain how to solve this equation please,

    xsquared-6x+4=0


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    #2
    sryanbruen
    Registered Users Posts: 13,612 ✭✭✭✭sryanbruen


    Mrsmum wrote: »
    I would really appreciate if anyone could explain how to solve this equation please,

    xsquared-6x+4=0

    As no factors from 4 divide evenly into 6, you use the quadratic formula (below) which can be found in your tables book:

    2000px-Quadratic_formula.svg.png

    Put A as 1 (because that's the number in front of x squared)
    Put B as -6 (because that's the number in front of x)
    Put C as 4 (because that's the third term)

    Now fill the above figures into the formula and put it into your calculator.

    NOTE: For the -b part of the formula, make sure you put -(-6), because the formula normally uses a minus but here you have a -6, so you put in two minus symbols - the other and the number in brackets.

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