simplify the followig (1/3^-2)-(1/9^-2)/3^-2
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Answer=8
Step-by-step explanation:
(1/3^-2)-(1/9^-2)/3^-2
=(1/3+1/9)(1/3-1/9)/1/9
=(3+1/9)(3-1/9)/1/9
=(4*2/9)/1/9
=8*9/9
=8
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