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posted by TUHITUHI on Friday, October 5, 2012 at 11:50am.
what must be added to each of the following expressions to make it a whole square (i) 4x^2 - 12x + 7 (ii) 4x^2 - 20x + 20
since (2x-3)^2 = 4x^2 - 12x + 9 (2x-5)^2 = 4x^2 - 20x + 25 it should be clear.
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