Choose the correct answer for the following question. 
Which one is the quadratic equation?
$\frac{5}{x}-3=x^2$
$x\left(x+5\right)=2$
$n-1=2n$
$\frac{1}{x^2}\left(x+2\right)=2$

Find which of the following equations are quadratic:
$7x^3-2x^2+10=(2x-5{)}^2$

Write constant term 
$7x^2-11$

Choose the correct answer for the following question.
Out of the following equations which one is not quadratic equation?
$x^2+4x=11+x^2$
$x^2=4x$
$5x^2=90+5$
$2x-x^2=x^2$

is the following equation quadratic?
$x^2+2x+11=0$

Find which of the following equations are quadratic:
$(\mathbf{x}-1{)}^2+(\mathbf{x}+2{)}^2+3(\mathbf{x}+1)=0$

Find which of the following equations are quadratic:
$(3x-1{)}^2=5(x+8)$

Check whether the following are quadratic equations:
$2x^2-3\sqrt{x}+5=0$

is the following equation quadratic?
$x^2-2x+5=x^2$

Test, whether the following equation is quadratic equation.
$x+\frac{1}{x}+x^2,x\ne 0$