which of the following have real roots. a)2x²+x-1=0. b)x²+x+1=0. c)x²-6x+6=0. d)2x²+15x+30=0 Question which of the following have real roots. a)2x²+x-1=0. b)x²+x+1=0. c)x²-6x+6=0. d)2x²+15x+30=0 in progress 0 Math Rose 1 month 2021-10-29T19:31:45+00:00 2021-10-29T19:31:45+00:00 1 Answer 0 views 0

## Answers ( )

Answer:For real roots discriminant should be greater than or equal to zero,i.e.

b²-4ac>0 or b²-4ac=0