We substitute the given into the equation given: a=-1, b=2, c=[tex] \frac{-1}{4} [/tex] =([tex] \frac{4b-3}{2a} [/tex]-1 =[tex] \frac{4(2)-3}{2(-1)} [/tex]-1 =[tex] \frac{8-3}{-2} [/tex]-1 =[tex] \frac{5}{-2} [/tex]-1 to continue, we can either find a common denominator or change the fraction to decimal. Fraction to Decimal: [tex] \frac{5}{-2} [/tex]=-2.5 Equation=-2.5-1=-3.5 OR Common Denominator: =[tex] \frac{5}{-2} [/tex][tex] \frac{-1}{1} [/tex]×[tex] \frac{-2}{-2} [/tex] (denominator should be -2=common) =[tex] \frac{5}{-2} [/tex]+[tex] \frac{2}{-2} [/tex] =[tex] \frac{7}{-2} [/tex] which also = to -3.5
