binomial cube formula problem 5:
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Calculate the following binomial cube formula:
(5x – 2y) • (25x² + 10xy + 4y²) =
answer:
(a – b) • (a² + ab + b²) = a³ – b³
(5x – 2y) • (25x² + 10xy + 4y²) = 125x³ – 8y³
how to calculate the parts:
(5x – 2y) • (25x² + 10xy + 4y²) =
125x³ – 50x²y + 50x²y – 20xy² + 20xy² – 8y³ =
125x³ – 50x²y + 50x²y – 20xy² + 20xy² – 8y³ =
125x³ – 8y³