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29 April, 20:54

Write each of the following as a polynomial in descending powers of its variable

1. 7x (x+3)

2. (7x+1) (x+3)

3. (x²+x) ²

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  1. 29 April, 23:25
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    1. 7x (x + 3)

    7x (x) + 7 (3)

    7x² + 21

    2. (7x + 1) (x + 3)

    7x² + 21x + x + 3

    7x² + 22x + 3

    3. (x² + x) ²

    (x² + x) (x² + x)

    x^4 + x³ + x³ + x²

    x^4 + 2x³ + x²
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