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30 December, 12:34

Which expression is equivalent to 64 - 9x2?

a) (32) 2 - (3x) 2

b) (32) 2 + (-3x) 2

c) (8) 2 - (3x) 2

d) (8) 2 + (-3x) 2

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Answers (1)
  1. 30 December, 14:50
    0
    The answer is A.

    B is wrong as squaring a negative will give you a positive.

    C and D are wrong as the first term is 16 not 64
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