Mister Exam

Factor polynomial y^2-81

An expression to simplify:

The solution

You have entered [src]
 2     
y  - 81
y281y^{2} - 81
y^2 - 81
Factorization [src]
(x + 9)*(x - 9)
(x9)(x+9)\left(x - 9\right) \left(x + 9\right)
(x + 9)*(x - 9)
Numerical answer [src]
-81.0 + y^2
-81.0 + y^2
Combinatorics [src]
(-9 + y)*(9 + y)
(y9)(y+9)\left(y - 9\right) \left(y + 9\right)
(-9 + y)*(9 + y)