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Ana2132
@Ana2132
December 2019
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Calcule o valor de (a+b)²-(a-b)²
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Dois produtos notáveis ...
(a+b)² - (a-b)²
(a² + 2ab + b²) - (a² - 2ab + b²)
a² + 2ab + b² - a² + 2ab - b²
a² - a² + 2ab + 2ab + b² - b²
0 + 4ab + 0
= 4ab
ok
2 votes
Thanks 4
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Verified answer
Dois produtos notáveis ...(a+b)² - (a-b)²
(a² + 2ab + b²) - (a² - 2ab + b²)
a² + 2ab + b² - a² + 2ab - b²
a² - a² + 2ab + 2ab + b² - b²
0 + 4ab + 0 = 4ab ok