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Posted by on Tuesday, November 15, 2011 at 1:40pm.

Find x-intercepts of x^4-9x^3+29x^2-40x+20

  • Math - , Tuesday, November 15, 2011 at 6:08pm

    Look for the low-hanging fruit first. A little synthetic division reveals

    x^4-9x^3+29x^2-40x+20 = (x-2)(x-2)(x^2 - 5x + 5)

    Factor that final quadratic to get the last two roots

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