if X square + 1 upon x square equal to 7 find x plus one upon x
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Answer:
(x + 1/x) = +3 or -3
Step-by-step explanation:
x² + 1/x² = 7
We know that,
(x + 1/x)² = x² + 1/x² + 2
x² + 1/x² = (x + 1/x)² - 2
(x + 1/x)² - 2 = 7
(x + 1/x)² = 2 + 7
(x + 1/x)² = 9
(x + 1/x) = +3 or -3
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