User login

11 + 4 =
Solve this simple math problem and enter the result. E.g. for 1+3, enter 4.

Factorizing of 3x2-75y2 is:

3(x+25y)(x-25y)

(3x+75y)(3x-75y)

3(x-25y)

3(x+5y)(x-5y)