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Math Help - finding zeros and roots by factoring

  1. #1
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    finding zeros and roots by factoring

    x^2+3x=0

    and

    5x^2-8x-4=0
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  2. #2
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    Quote Originally Posted by ashleeyy- View Post
    x^2+3x=0
    x(x+3) = 0. This means either x=0 or x+3=0.


    5x^2-8x-4=0
    Because 5 is prime it must be 5 x 1 for coefficients of x^2.
    Trying -2*2 for the -4 and manipulating gives

    (5x+2)(x-2)=0

    This will come naturally with practice
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