Question -
For what value of m does the equation, x2+2x+m=0 have two distinct real roots?
Options:
A .  m = 1
B .  m
C .  m > 1
D .  m = 2
Answer: Option B : B 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
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