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16 October, 17:18

How many Solutions are in the equation 3n (2n-8) = 24-6n

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  1. 16 October, 17:23
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    two (n = 4, and n = - 1)

    Step-by-step explanation:

    Let's solve it as follows:

    First, we can divide out the common factor of 3 from each side, to get:

    n (2n-8) = 8 - 2n

    Next, we expand, and move all the terms over to the right hand side (so that we have 0 on the LHS - as this is how we will want to solve the quadratic equation):

    2n^2 - 8n - 8 + 2n = 0

    2n^2 - 6n - 8 = 0.

    We also see we can further simplify by dividing out the factor of 2, to get:

    n^2 - 3n - 4. = 0

    Next, as this is a quadratic, the usual next step is to factorise, to get:

    (n-4) (n+1) = 0

    So we see that n = 4 and n = - 1 are the two solutions.
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