Q. 30

Asked by Rayeesa | 10th Apr, 2018, 07:30: AM

Expert Answer:

begin mathsize 16px style straight x equals straight k space is space one space of space the space solution space of space 2 straight x squared plus 5 straight x minus straight k equals 0
rightwards double arrow 2 straight k squared plus 5 straight k minus straight k equals 0
rightwards double arrow 2 straight k squared plus 4 straight k equals 0
rightwards double arrow 2 straight k left parenthesis straight k plus 2 right parenthesis equals 0
rightwards double arrow 2 straight k equals 0 space or space straight k plus 2 equals 0
rightwards double arrow straight k equals 0 space or space straight k equals negative 2
rightwards double arrow straight x equals 0 space or space straight x equals negative 2 end style

Answered by Rashmi Khot | 10th Apr, 2018, 08:45: AM