Question

determine the nature of roots of 2x2+x-1=0

Answer 1

D = b2 - 4ac
a=2 b= 1 c= (-1)

D = (1)2 - 4(2)(-1)
= 2 - (-8)
= 2 + 8 = 10
here, D>0
so the roots will be real and distinct.

Answer 2

Answer:

D= B2 - 4ac

D= 1 - 4[2][-1]

D= 1 +8 = 9

here, d > 0 so the roots are real and unequal.

Step-by-step explanation: