solve plese ..... ...................
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here's your answer
hope it helps
hope it helps
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Hi ,
here is your answer !!!
given
x + y = 3
xy =2
to find => x⁴ + y ⁴ = ?
=> (x +y )² = x² + y ² + 2xy
=> 3 ² => x² + y² + 2 * 2
x ² + y² = 9 - 4
x² + y² = 5
now ,
squaring both side we get
=> (x² + y² ) ² = x ⁴ + y⁴ + 2 x² y² .
=> 5 ² = x⁴ + y⁴ + 2 * ( 2²)
25 - 2* 4= x⁴ + y⁴
=> x⁴ + y⁴ = 25 - 8
x⁴ + y⁴ = 17 .
hope it helps you dear friend !!!
here is your answer !!!
given
x + y = 3
xy =2
to find => x⁴ + y ⁴ = ?
=> (x +y )² = x² + y ² + 2xy
=> 3 ² => x² + y² + 2 * 2
x ² + y² = 9 - 4
x² + y² = 5
now ,
squaring both side we get
=> (x² + y² ) ² = x ⁴ + y⁴ + 2 x² y² .
=> 5 ² = x⁴ + y⁴ + 2 * ( 2²)
25 - 2* 4= x⁴ + y⁴
=> x⁴ + y⁴ = 25 - 8
x⁴ + y⁴ = 17 .
hope it helps you dear friend !!!
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