(3+√8) whole cube is equal to
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27 + 8√8 + 27√8 + 72
99 + 35√8
99 + 35√8
Answered by
1
( 3 + √8 )^3
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use identiy :
( a + b )^3=a^3 + 3a^2b + 3ab^2 + b^3
here , a = 3 , b = √8
( 3 + √8 )^3
=(3)^3 + 3( 3)^2(√8)+3(3)(√8)^2+(√8)^3
=27 + 27 (√8) + 72 + 8 (√8)
=99 + 35 √8
=99 + 35 ( 2√2)
=99 + 70 √2
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Your Answer: 99 + 70√2
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____________________
use identiy :
( a + b )^3=a^3 + 3a^2b + 3ab^2 + b^3
here , a = 3 , b = √8
( 3 + √8 )^3
=(3)^3 + 3( 3)^2(√8)+3(3)(√8)^2+(√8)^3
=27 + 27 (√8) + 72 + 8 (√8)
=99 + 35 √8
=99 + 35 ( 2√2)
=99 + 70 √2
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Your Answer: 99 + 70√2
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