Q. 144.5( 6 Votes )

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Answer :

Given that,

x + = 9

Squaring both sides, we get

(x + )^{2} = 9^{2}

x^{2} + + 2 = 81

x^{2} + = 79

Again,

Squaring both sides, we get

(x^{2} + )^{2} = 79^{2}

x^{4} + + 2 = 6241

x^{4} + = 6239

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