Using appropriate identity find (3x+5y)(9x2-15xy+25y2)
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( 3x + 5y )( 9x² - 15xy + 25y² )
( 3x + 5y )[(3x)² - (3x)(5y) + (5y)²]
Similar to ( a + b )( a² - ab + b² ) = a³ + b³
( 3x + 5y )[(3x)² - (3x)(5y) + (5y)²] = (3x)³ + (5y)³
27x³ + 125y³
Answer : 27x³ + 125y³
Hope it helps
( 3x + 5y )( 9x² - 15xy + 25y² )
( 3x + 5y )[(3x)² - (3x)(5y) + (5y)²]
Similar to ( a + b )( a² - ab + b² ) = a³ + b³
( 3x + 5y )[(3x)² - (3x)(5y) + (5y)²] = (3x)³ + (5y)³
27x³ + 125y³
Answer : 27x³ + 125y³
Hope it helps
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