Question

(4x-7)² qual a resposta?Me ajudem pleaseee

Answer 1

Formato:

(a - b)² = a² - 2a.b + b²
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= (4x - 7)²

= (4x)² + 2.4x.(-7) + (-7)²

= 16x² + 8x.(-7) + 49

= 16x² - 56x + 49
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Outra forma:

= (4x - 7)²

= (4x - 7).(4x - 7)

= 4x.4x + 4x.(-7) - 7.4x - 7.(-7)

= 16x² - 28x - 28x + 49

= 16x² - 56x + 49
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Answer 2

Olá,

(4x-7)² = (4x)² + 2(4x)(-7) + (-7)² = 16x² -56x + 49