Which of the following are qudratic equations?
(i) `x^2-x-5=0`
(ii) `y^2+4=3y-1`
(iii) `3x^2-5x+3=0`
(iv) `x-3=4x`
(v) `(y-2)(y+2)=0`
(vi) `p+3=1/(p^2)`
(vii) `3/y-4=y`.

Answer

Quadratic equation : (i),(ii),(iii),(v),(vii).
Not a quadratic euqation : (iv),(vi).