Why do I get different answer when I use the quadratic equation? In finding the zeros of a function. I used factoring and completing the squares and it gave me the same answer..
How am I going to defend that my answer using quadatic formula is also right ?
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Using the quadratic formula we get x=(-3±sqrt(3^2-4*1*2))/2=(-3±1)/2 so x=-1 or x=-2.
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