Question

which is quadratic equation?
al x+ 1/x=2
b) x² + 1 = (a +3) 2
c x(x+2)
d) x+1/x
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Answer 1

Answer:

the answer should be all of these, all are quadratic equations.

Step-by-step explanation:

if you simplify every equation mentioned above in the options...you will get the highest degree as 2 hence all the equations are quadratic because the main characteristic of quadratic equation is that the degree of polynomial should be 2.

I HOPE IT HELPS....