Question

If x4+1/x4=146 then which number is subtracted from both sides to make lhs(x2+1/x2)2

Answer 1

Answer:

x^4+1/x^4=146

(x^2+1/x^2)^2

= x ^4 + 2 + 1/ x^4

= 146 + 2

= 148

therefore we must add 2 on both sides or substract -2 on both sides.......

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