September 2018 1 39 Report
Dadas las siguientes afirmaciones.

I. (a - b)^2 = a^2 - 2ab - b^2

II. (x + a ) ( x + b) = x^2 + abx + (a + b)

III. ( a + b )^2 + ( a - b)^2 = 4ab

son falsas:

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