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14 April, 21:10

Factorise using the difference of two squares:

I) 4x squared - (2x+3) squared

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  1. 14 April, 21:30
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    4x² - (2x + 3) ²

    4x² - (2x + 3) (2x + 3)

    4x² - (2x (2x + 3) + 3 (2x + 3))

    4x² - (2x (2x) + 2x (3) + 3 (2x) + 3 (3))

    4x² - (4x² + 6x + 6x + 9)

    4x² - (4x² + 12x + 9)

    4x² - 4x² - 12x - 9

    -12x - 9

    -3 (4x) - 3 (3)

    -3 (4x + 3)
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