If the value of a2+1/a2 is 786, then the value of a -1/a2 is____
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Answer:
±28
Step-by-step explanation:
A²+1/A²=786
A²+1/A²-2(A×1/A) + 2(A×1/A)=786
(A-1/A)²+2=786
(A-1/A)²=786-2=784
A-1/A=±√784=±28
Cheers !
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