Question

which of the following is a quadratic equation. *

x+1/x=6

(x+1)²=x²

2(x-1)²=2x²

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Answer 1

Answer:

x + 1/x = 6

Step-by-step explanation:

In the options 2 and 3 , after simplifying the term  $x^{2}$  gets cancelled out and the equation as a whole becomes a linear equation.

2.

$x^{2} +2x+1 =x^{2} \\2x+1=0$

3.

$2(x^{2} -2x +1 )=2x^{2} \\2x^{2} -4x+2= 2x^{2} \\-4x+2=0$

Answer 2

Answer:

here is the answer

Step-by-step explanation:

none of these is correct because solving all the equation we get that all the equations are linear no are quadratic in nature.

hope that this will help you to understand the concept of quadratic polynomial.