What is the rational root of x^3+3x^2-6x-8=0

The rational roots of the given equation are -4, -1, 2

Given, equation is:

We have to find the rational root of the given cubic equation.

Now, let us try it by trail and error method.

So, put x = 1 in given

Now we have got two roots 2 and – 1

We can find the third root by formula sum of roots

Hence, the rational roots of the given equation are -4, -1, 2

-362

step-by-step explanation:

(12)(4)+2(12)-34(12)+2(12)-3

  \/         \/         \/         \/

  48 +   24 -   408 + 24 - 3

      \   /               \   /

          72     -     432 - 3 = -363

step-by-step explanation:

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