y=4x^2 - 5x -4 x=? Sep 23 | Brandon from Toledo, OH | 1 Answer | 0 Votes Mark favorite Subscribe Comment
based on the quadratic formula: x= (-b ±√(b^2 - 4ac))/2a x = [5 ± √(25-(4)(4)(-4))]/2(4) = [5 ± √(89)]/8 Sep 23 | Don L. Comment