Posted by **Lavern** on Saturday, March 31, 2012 at 11:08pm.

please help

Factor completely

144b^2+648bg+729g^2

- math problem -
**Reiny**, Sunday, April 1, 2012 at 8:17am
start by pecking away common factors

144b^2+648bg+729g^2

= 9(16b^2 + 72bg + 81g^2)

ahh, looks like perfect squares at front and back

could (4b + 9g)^2 give us a middle term of 72 bg ??

2(4)(9) = 72 , yeaaaahhh!

= 9(4b+9g)^2

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