algebra1
posted by kathy .
factor:
180s^2+300sf+125f^2

180s^2+300sf+125f^2
Take out common factor of the coefficients, namely 5
5(36s²+60sf+25f²)
=5((6x)²+2*(30sf)+(5f)²)
the expression inside parentheses is in the form of a perfect square.
Try to factorize accordingly.