SOLUTION: 9g to the 2nd power - 6gh + h to the 2nd power

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Question 307843: 9g to the 2nd power - 6gh + h to the 2nd power
Answer by mananth(16946) About Me  (Show Source):
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9g^2 -6gh+h^2
9g^2-3gh-3gh+h^2
3g(3g-h)-h(3g-h)
(3g-h)(3g-h)
(3g-h)^2