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17-04-2017
Mathematics

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(a+bx)(a-bx)=25x-4x^3 find the value of b^-a

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23-04-2017

25x - 4x³ can be rewritten as:

x(25 - 4x²) = x(5 + 2x)(5 - 2x)

Therefore a = 5 & b = 2

b^-a = 1 / b^a = 1 / 2^5 = 1/32

Hope that helps

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