Plz help.. By solving this sum ..
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Answer:
x^3 = ( 5√2-7 )^3
( 5√2)^3 - 7^3 + 3( 5√2 ) ( 7 )^2 - 3( 5√2 )^2 ( 7 )
250√2 - 343 + 785√2 - 1050
985√2 - 1393
985√2 - 1393 -1 / 5 √2 - 7
9850 - 6965√2 - 6895√2 + 9751 - 1 / 5√2 - 7
19600 - 13860√2 / 5√2 - 7
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