For what value of m does the equation, x2+2x+m=0 have two distinct real roots?
Step 1 : For, x2+2x+m=0,
⇒ a=1, b=2, c=m
We know that
D=b2–4ac
⇒D=(2)2–4m
=4−4m
Step 2 : The roots of a quadratic equation are real and distinct only when D>0
Step 3 : 4−4m>0
4>4m
m<1