Question

(7x – 3 y)
$( {7x - 3y)}^{3}$
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Answer 1

Answer:

(a - b) ³ = a³ - 3a²b + 3ab² - b³

(7x - 3y)³ = (7x)³ - 3(7x)²(3y) + 3(7x)(3y)² - (3y)³

= 343x³ - 441x²y + 189xy² - 27y³

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