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MathsGee is Zero-Rated (You do not need data to access) on: Telkom |Dimension Data | Rain | MWEB

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Simplify without using a calculator:

$$ (\frac{5}{4^{-1} -9^{-1}})^{-2}$$
in Mathematics by Diamond (60,604 points) | 956 views

1 Answer

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= [(4^-1 - 9^-1)/5]^2

= [(1/4 - 1/9)/5]^2

=  (9/36 - 4/36)^2/5^2

= (5/36)^2/5^2

= (5^2)/(36^2)  x 1/5^2

= 1/36^2 = 36^(-2)
by Diamond (42,256 points)

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