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If 5a-15a +5=0, then a²+1/a²= |
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Answer» Step-by-step EXPLANATION: a−1a=5 (a+1a)2=a2+2+1a2=a2−2+1a2+4=(a−1a)2+4=52+4=29 a+1a=±29−−√ a2−1a2=(a+1a)(a−1a)=±29−−√⋅5 a2−1a2=±529−−√ |
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