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Math Help - Multiplying numbers with square roots

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    Multiplying numbers with square roots

    I attempted this problem but got it incorrect. If someone could guide me step by step on how to do this problem it would be greatly appreciated.
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    Re: Multiplying numbers with square roots

    Quote Originally Posted by DasRabbit View Post
    I attempted this problem but got it incorrect. If someone could guide me step by step on how to do this problem it would be greatly appreciated.
    This is the product of special binomials. You can just use the distributive law or the fact that

    (a-b)(a+b)=a^2-b^2

    In your case a=4x \quad b = 5\sqrt{6}
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