Mister Exam

Factor polynomial x^2-20

An expression to simplify:

The solution

You have entered [src]
 2     
x  - 20
$$x^{2} - 20$$
x^2 - 20
Factorization [src]
/        ___\ /        ___\
\x + 2*\/ 5 /*\x - 2*\/ 5 /
$$\left(x - 2 \sqrt{5}\right) \left(x + 2 \sqrt{5}\right)$$
(x + 2*sqrt(5))*(x - 2*sqrt(5))
Numerical answer [src]
-20.0 + x^2
-20.0 + x^2