please answer this . its urgent . please........
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brunoconti:
is it 4th root of 3 or 4×root3
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3
★★Heya★★
( a³ - b³ ) = ( a - b )³ + 3ab ( a - b )
=>
(x³ - 1/x³ ) = ( x - 1/x )³ + 3 ( x - 1/x )
=>
( x³ - 1/x³ ) = ( 5 + 4√3 )³ + 3 ( 5 + 4√3)
=>
( x³ - 1/x³ ) =
125 + 192√3 + 3 ( 25 ) ( 4√3 ) + 3 ( 5 ) ( 48 ) + 15 + 12√3.
=>
( x³ - 1/x³ ) = 860 + 504√3
( a³ - b³ ) = ( a - b )³ + 3ab ( a - b )
=>
(x³ - 1/x³ ) = ( x - 1/x )³ + 3 ( x - 1/x )
=>
( x³ - 1/x³ ) = ( 5 + 4√3 )³ + 3 ( 5 + 4√3)
=>
( x³ - 1/x³ ) =
125 + 192√3 + 3 ( 25 ) ( 4√3 ) + 3 ( 5 ) ( 48 ) + 15 + 12√3.
=>
( x³ - 1/x³ ) = 860 + 504√3
ok
thanks.
I didn't understand that how 192 root 3 came.
please help
(4√3)³ = 4³ × (√3)³ = 64 × (√3)² × √3. =. 3×64 √3 = 192√3
thank you very much
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3
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Step-by-step explanation:
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now which is the right answer
mine is coming different
how 192 root 3 came
in last 4th step
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