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4 March, 12:37

Which of the following is NOT a perfect square?

A) 49x^2

B) 64a^2

C) 121y^2

D) 125z^2

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Answers (1)
  1. 4 March, 15:06
    0
    d) 125z^2

    Step-by-step explanation:

    A perfect square is a number gotten by square an integer e. g. 4 = 2^2, 9 = 3^3. So, 4 and 9 are perfect squares.

    lets take each option

    a) 49x^2 = 7^2 * x^2 This is a perfect square

    b) 64a^2 = 8^2 * a^2 This is a perfect square

    c) 121y^2 = 11^2 * y^2 This is a perfect square

    d) 125z^2 = (10^2 + 5^2) * z^2 This is not a perfect square
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