simplify (5x-7y) cube+(5x+7y) cube
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Step-by-step explanation:
Hi ,
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( a - b )³ + ( a + b )³ = 2[ a³ + 3ab² ]
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Here ,
a = 5x , b = 7y
( 5x - 7y )³ + ( 5x + 7y )³
= 2 [ ( 5x )³ + 3 × 5x × ( 7y )² ]
= 2 [ 125x³ + 15 x × 49y² ]
= 2[ 125 x³ + 735xy² ]
= 250x³ + 1470xy²
I hope this helps you.
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