Question 59581
a. 2x^2+x-1=0 
discrim=1^2-4*2*-1=9; 2 real zeroes
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b. 4/3x^2-2x+3/4=0 
multiply thru by 12 to get:
16x^2-24x+9=0
discrim= 24^2-4*16*9=0; 2 identical real zeroes
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c. m^2+m+1=0 
discrim=1^2-4*1*1=-3 ; 2 complex zeroes.
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Cheers,
Stan H.