Question
For what value of m does the equation, x2+2x+m=0 have two distinct real roots?
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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:
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
Was this answer helpful ?
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