plzzz tell theee answer its urgent
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Hello dear
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we need a formula which is
( a + b )² = a² + b² + 3ab ( a + b )
now
given
( 99 )³
= ( 90 + 9 )³
= ( 90 )³ + ( 9 )³ + 3 ( 90 ) ( 9 ) { 90 + 9 }
= 729000 + 729 + 2430 ( 99 )
= 729000 + 729 + 240570
= 970299
thanks
====================================
====================================
we need a formula which is
( a + b )² = a² + b² + 3ab ( a + b )
now
given
( 99 )³
= ( 90 + 9 )³
= ( 90 )³ + ( 9 )³ + 3 ( 90 ) ( 9 ) { 90 + 9 }
= 729000 + 729 + 2430 ( 99 )
= 729000 + 729 + 240570
= 970299
thanks
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