Question

expansion expansion expansion expansion ​

Answer 1

Answer:

hence the answer is

-52

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Answer 2

Answer:

Value of x³ + 27/x³ is 28.

Step-by-step explanation:

Given :

x + 3/x = 4

Cubing on both sides

( x + 3/x )³ = 4³

Using algebraic identity (a + b)³ = a³ + b³ + 3ab( a + b)

x³ + ( 3/x )³ + 3( x )( 3/x )( x + 3/x ) = 64

Using Laws of exponents ( a/b)^m = a^m / b^m

x³ + 3³/x³ + 9( 4 ) = 64

x³ + 27/x³ + 36 = 64

x³ + 27/x³ = 64 - 36

x³ + 27/x³ = 28

Therefore the value of x³ + 27/x³ is 28.