Q. 35.0( 1 Vote )
Which of the following is not a quadratic equation?
A. 3x – x2 = x2 + 5
B. (x + 2)2 = 2(x2 – 5)
C. (√2x + 3)2 = 2x2 + 6
D. (x – 1)2 = 3x2 + x – 2
Answer :
A. 
This is a quadratic equation of the form 
hence i.e. of degree 2 (a ≠ 0, a, b, c are real numbers).
B. 
using 
This is a quadratic equation of the form 
i.e. of degree 2 (a ≠ 0, a, b, c are real numbers).
C. 
using 
This is not quadratic since it is not of the form 
i.e. of degree 2 (a ≠ 0, a, b, c are real numbers).
D. 
using 
This is a quadratic equation of the form 
i.e. of degree 2 (a ≠ 0, a, b, c are real numbers).
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