Se A= (x+2)² e B= (x-2)² Calcule A-B.... Pergunta de ideia deMirellaAF1234

MirellaAF1234 @MirellaAF1234

December 2019 1 176 Report

Se A= (x+2)² e B= (x-2)² Calcule A-B

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GowtherBr Vamos lá :

A = (x + 2)² = (x + 2)(x + 2)
= x² + 2x + 2x + 2²
= x² + 4x + 4

B = (x - 2)² = (x - 2)(x - 2)
= x² - 2x - 2x + 2²
= x² - 4x + 4

A - B = ( x² + 4x + 4) - ( x² - 4x + 4 )
A - B = x² + 4x + 4 - x² + 4x - 4
A - B = x² - x² + 4x + 4x + 4 - 4
A - B = 8x

Espero ter ajudado !!!

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