If 1/2 isa root of the quadratic equation 4b2-6b+k=0, find the value of k

Asked by Athira | 29th Nov, 2015, 03:27: PM

Expert Answer:

begin mathsize 16px style 1 half space i s space a space r o o t space o f space q u a d r a t i c space e q u a t i o n space 4 b squared minus 6 b plus k equals 0 rightwards double arrow 4 open parentheses 1 half close parentheses squared minus 6 cross times 1 half plus k equals 0 rightwards double arrow 4 cross times 1 fourth minus 3 plus k equals 0 rightwards double arrow 1 minus 3 plus k equals 0 rightwards double arrow negative 2 plus k equals 0 rightwards double arrow k equals 2 end style

Answered by Rashmi Khot | 30th Nov, 2015, 10:22: AM