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Resolve into factors. (x-y)3 - (x-y)3 |
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Answer» Think about Pascal's TRIANGLE to expand these terms : (x³ + 3 xy² + 3x²y + y³ ) + ( x³ + 3xy² - 3x²y - y³) by using formula ( a + b)³ + ( a- b ) ³ Combine like terms, x³ + 3xy² + 3x²y + y³ + x³ + 3xy² - 3x²y - y³ by cancelling plus, minus..we get, 2x³ + 6xy² = 2x ( x² + 3y²) Thank you :) |
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