Question

Use the quadratic formula to solve 2y2 + 6y – 8 = 0.
A {–4, –1} B {4, –1} C {–4, 1} D {4, 1}

Answer 1

y = [-6 +/- sqrt(6^2 -4*2*-8)]  /  2*2
  =  (-6 +/-  sqrt 100) / 4
   = (-6+10) / 4  , (-6-10) / 4
   =  (1 , -4)

the answer is C