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JulinhaMGomez
@JulinhaMGomez
May 2020
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Pra hoje genteee: (a+b)² - (a-b)² é igual a :
a) 2a² + 2b²
b) 4ab
c) 2ab
d) 2a² - 2b²
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urielcardoso
B- 4ab
(a+b)² = a²+2ab+b²
(a-b)² = a²-2ab+b²
assim: a²+2ab+b² - (a²-2ab+b²)= 4ab
1 votes
Thanks 1
JulinhaMGomez
Obg :)))
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(a+b)² = a²+2ab+b²
(a-b)² = a²-2ab+b²
assim: a²+2ab+b² - (a²-2ab+b²)= 4ab