Attached two seperate questions on quadratic equation.

Asked by sudhanshubhushanroy | 17th Nov, 2017, 09:28: AM

Expert Answer:

begin mathsize 16px style straight x squared plus straight x minus 1 minus straight k equals 0 space
straight b squared minus 4 ac
1 squared plus 4 left parenthesis straight k plus 1 right parenthesis..... left parenthesis 1 right parenthesis
straight x squared minus straight x minus 1 plus straight k equals 0 space
straight b squared minus 4 ac
open parentheses negative 1 close parentheses squared minus 4 left parenthesis straight k minus 1 right parenthesis..... left parenthesis 2 right parenthesis
when space straight k space is space greater than negative 1
eq left parenthesis 1 right parenthesis space is space negative space and space left parenthesis 2 right parenthesis space is space positve
so space 2 space roots
1 greater than straight k greater than negative 1 space both space eq space is space positive space so space 4 space roots
and space so space on...
end style

Answered by Arun | 5th Dec, 2017, 04:07: PM