Question

Which of the following are quadratic equations?
(iv)$x-\frac{3}{x }=x^{2}$
(v)$2x^{2}- \sqrt{3x} +9=0$
(vi)x²-2x-√x-5=0

Answer 1

SOLUTION IS IN THE ATTACHMENT

METHOD TO CHECK whether the given equation is quadratic or not :  

To check whether a given equation is  quadratic or not  first write the given equation in its simplest form and then compare the equation with the standard form of a quadratic equation, i.e. ax² + bx + c = 0 , a ≠0 .

If the given equation follows the form of quadratic equation (ax² + bx + c = 0), then it is a quadratic equation otherwise not.

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Answer 2

Ques.. Which of the following are quadratic equations?

(iv)$x-\frac{3}{x }=x^{2}$

(v)$2x^{2}- \sqrt{3x} +9=0$

(vi)x²-2x-√x-5=0

Answer...iv and v...