Question

X^4+64 will be the perfect square by adding

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Answer 1

`( { {x}^(2) })^(2) + 16 {x}^(2) + {8}^(2) \\ ( {x}^(2) + 8) ^(2) \\ ( { {x}^(2) })^(2) - 16 {x}^(2) + {8}^(2) \\ ( {x}^(2) - 8) ^(2)`

+16x² or -16x² is the answer