Question
There are two equations a and b, which have “n” roots in common. What is the value of n?
A: x3+2x2+7x-2=0 B: 8x2-4x+4=0 :x>0
A: x3+2x2+7x-2=0 B: 8x2-4x+4=0 :x>0
Answer: Option A
:
A
Option (a)
Equate a&b to get the common values
x3+2x2+7x-2=8x2-4x+4
solving we get
(x-1)(x-2)(x-3)=0
x=1,x=2,x=3
these values do not satisfy both equations. Hence, there are 0 roots in common.
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:
A
Option (a)
Equate a&b to get the common values
x3+2x2+7x-2=8x2-4x+4
solving we get
(x-1)(x-2)(x-3)=0
x=1,x=2,x=3
these values do not satisfy both equations. Hence, there are 0 roots in common.
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