A- 1/A=7 then A²+ 1/A² =?
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hey mate there's your answer
A-1/A=7
(A -1/A)^2=(7)^2
A^2 -2 A .(1/A). +(1/A)^2=49
A^2-2+1/A^2 = 49
A^2+1/A^2=49+2
A^2+1/A^2=51
hope it helps you......
Thank you!!!
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