solve the equation x^4+4x^3+5x^2+2x-2=0 one root being -1+root under -1
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it is known that if the coefficients of a polynomial are rational , and one root contains a surd then the other root must contain the surd's compliment.
thus another of your root is -1-root(-1)
the roots when multiplied give the factor :::>(x^2)-2x+2 , now divide the expression using long division(that give you a quadratic equation) and finally use basic quadratics knowledge.
thus another of your root is -1-root(-1)
the roots when multiplied give the factor :::>(x^2)-2x+2 , now divide the expression using long division(that give you a quadratic equation) and finally use basic quadratics knowledge.
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