prove that 9^3/2 -3 *5^0 -(1/81)^-1/2 = 15 Pls help, correct answer, I’ll mark as brainliest

Question

prove that 9^3/2 -3 *5^0 -(1/81)^-1/2 = 15

Pls help, correct answer, I’ll mark as brainliest

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Ngọc Hoa 5 months 2021-09-05T05:54:55+00:00 1 Answers 2 views 0

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  1. vankhanh
    0
    2021-09-05T05:56:30+00:00
    Reply

    Answer:

    9^{3/2}-3\times 5^0-(\dfrac{1}{81})^{-1/2}=15

    Step-by-step explanation:

    The given expression is :

    9^{3/2}-3\times 5^0-(\dfrac{1}{81})^{-1/2}=15

    We need to prove that LHS is equal to RHS.

    Taking LHS,

    =9^{3/2}-3\times 5^0-(\dfrac{1}{81})^{-1/2}

    =(3)^{2\times\dfrac{3}{2}}-3-(\dfrac{1}{9})^{2\times \dfrac{-1}{2}}\\\\=27-3-9\\\\=15\\\\=RHS

    Hence, LHS = RHS.

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