SOLUTION: What is the simplest explanation on how to factor 4a^2 - 4a + 1, as well as {{{ 81r^2 minus 36rs plus 4s^2?

Question 687745: What is the simplest explanation on how to factor 4a^2 - 4a + 1, as well as 81r^2 minus 36rs plus 4s^2?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
What is the simplest explanation on how to factor 4a^2 - 4a + 1, as well as 81r^2 minus 36rs plus 4s^2?
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Both ae "perfect square trinomials.
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4a^2 - 4a + 1 = (2a-1)^2
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81r^2 minus 36rs plus 4s^2 = (9r-2s)^2
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cheers,
Stan H.
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