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Posted by **Susan** on Sunday, September 5, 2010 at 9:50am.

12r^2 +36rf +27f^2

5x^5-20x^4+30x^3

Can anyone please help me with these two problems. I have to get them done and do not understand them. Please help me.

- math -
**Reiny**, Sunday, September 5, 2010 at 10:04am12r^2 +36rf +27f^2

= 3(4r^2 + 12rf + 9f^2)

= 3(2r+3f)(2r+3f) or 3(2r+3f)^2

5x^5-20x^4+30x^3

= 5x^3(x^2 - 4x + 6)

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