The Number of Real Roots of The Equation x² – 3 lxl+2=0 is

 

  1. 4
  2. 3
  3. 2
  4. 1
Anurag Mishra Professor Asked on 3rd October 2015 in Maths.
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1 Answer(s)

Answer: (1) 4 

Explanation:-
X2 – 3X + 2 = 0 and X2 + 3X + 2 = 0
For X2 – 3 X + 2 = 0
D = (-3)2 – 4 (2)(1) = 9 – 8 = 1 > 0
Therefore, X2 + 3X + 2 = 0 has two real
For X2 + 3 X + 2 = 0
D = (3)^2 – 4(2) (1) = 9 – 8 = 1 > 0
So, X2 + 3 lXl + 2 = 0
Then, the real roots is 4.
Hence, the answer is (1) 4.

Anurag Mishra Professor Answered on 3rd October 2015.
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