If $$ {x+{1\over x}}=3$$ then find the value of $$ {x^2}-{1\over {x^2}}$$:
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Q:
If $$ {x+{1\over x}}=3$$ then find the value of $$ {x^2}-{1\over {x^2}}$$:
- 1$$ {8\sqrt{2}}$$false
- 2$$ {5\sqrt{8}}$$false
- 3$$ {5\sqrt{3}}$$false
- 4$$ {3\sqrt{5}}$$true
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