August 2018 1 50 Report
Completa en tu cuaderno los numeros para que sean ciertas las igualdades siguiente.
a) .....² + 5 = 14
b)3² +2 . 3 . 5 + ..... = (3 +5)²
c) 4² - 2 . 4 . ... +..... =(4-8)²
d)5² - ...... = (5+7) . (5-7)

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