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Expansion of (x-y)^2

By what numbe...

Question

By what number should (3raised to -2)be multiplied so that the product may be equal to (-5raised to -1)

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Solution

let the no. be 'x'
according to question
3^(-2) × x =(-5)^(-1)
x/9 = -1/5
x = -9/5

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