Question
If two roots of the equation x3−3x+2=0 are same, then the roots will be
Answer: Option B
:
B
Given equation is x3−3x+2=0
⇒ x2(x−1)+x(x−1)−2(x−1)=0
⇒ (x−1)(x2+x−2)=0⇒ (x−1)(x−1)(x+2)=0
Hence roots are 1, 1, -2
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:
B
Given equation is x3−3x+2=0
⇒ x2(x−1)+x(x−1)−2(x−1)=0
⇒ (x−1)(x2+x−2)=0⇒ (x−1)(x−1)(x+2)=0
Hence roots are 1, 1, -2
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