Question

x+y=98 find the value of x^2+y^2=?

Answer 1

Answer:

x

2

+

x

2

1

=98

(x+

x

1

)

2

=x

2

+

x

2

1

+2

98+2=100

∴x+

x

1

=10

(x+

x

1

)

3

=x

3

+

x

3

1

+3(x+

x

1

)

x

3

+

x

3

1

+3(x+

x

1

)=1000

x

3

+

x

3

1

=1000−3(10)=970

Step-by-step explanation:

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