1.

X12 = 120 , y12 = 260, sx= 24 , sy= 12 , r = -0.8 ,x= 4,00,000, b= ?​

Answer»

ANSWER:

\begin{gathered} = {x}^{12} - {y}^{12} \\ = {( {x}^{6} )}^{2} - {( {y}^{6} )}^{2} \\ = ( {x}^{6} + {y}^{6} )( {x}^{6} - {y}^{6} ) \\ = ( {x}^{6} + {y}^{6} )( {( {x}^{3} )}^{2} - {( {y}^{3} )}^{2} ) \\ = ( {x}^{6} + {y}^{6} )( {x}^{3} + {y}^{3} )( {x}^{3} - {y}^{3} ) \\ = ( {x}^{6} + {y}^{6} )(x + y)( {x}^{2} - xy + {y}^{2} )(x - y)( {x}^{2} + xy + {y}^{2} )\END{gathered}

=x

12

−y

12

=(x

6

)

2

−(y

6

)

2

=(x

6

+y

6

)(x

6

−y

6

)

=(x

6

+y

6

)((x

3

)

2

−(y

3

)

2

)

=(x

6

+y

6

)(x

3

+y

3

)(x

3

−y

3

)

=(x

6

+y

6

)(x+y)(x

2

−xy+y

2

)(x−y)(x

2

+xy+y

2

)


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