Question

what can we say about the nature of the roots of the quadratic equation 2xsq.+4x-7=0

Answer 1

We are given, 2x² + 4x - 7 = 0
 
    So, D = b²-4ac
              = (4)² - 4(2)(-7)
              = 16 +56
          D =  72
       so, D > 0.

So, Roots of given Eqn. are real and unequal. 

Answer 2

hope this helps......