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31 January, 13:03

Multiply 5 (5-x) (5+x). What is the product?

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Answers (2)
  1. 31 January, 15:56
    0
    First mutiply the binomials: (5-x) (5+x)

    5 (25+5x-5x-x^2), and finally multiply the polynomial by five:

    -5x^2+125
  2. 31 January, 16:01
    0
    First we use a^2-b^2 = (a-b) (a+b)

    Here a = 5 and b = x

    5 (5^2-x^2)

    5 (25-x^2)

    Now multiply with 5

    125 - 5x^2
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