Oi...
(3x - 2y)² =
(3x - 2y).(3x - 2y) =
9x² - 6xy - 6xy + 4y²
9x² - 12xy + 4y²
Bons estudos.
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Oi...
(3x - 2y)² =
(3x - 2y).(3x - 2y) =
9x² - 6xy - 6xy + 4y²
9x² - 12xy + 4y²
Bons estudos.