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12 May, 01:31

How to factorise 5x square - 20?

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  1. 12 May, 03:01
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    5 (x² - 4)

    Step-by-step explanation:

    5x² - 20

    5 can divide both 5 and 20, 5x²/5 and - 20/5 = x² and - 4

    5 (x² - 4), to know if you are correct, multiply 5 by the bracket and you get the question back
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