Which of the following are quadratic equations in x?
(x + 2)3 = x3 – 8
The given equation 
is a quadratic equation.
Explanation Given 
On getting reduced it becomes 
= 
Now, using 
where a = 6, b = 12, c = 16
It is in the form 
(a ≠ 0, a, b, c are real numbers)
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