given x^4-5x^2+4...how can i use the quadratic formula to find irrational roots? i know that i need to transform x^4...but i don't know how... thanks
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Originally Posted by alessandromangione given x^4-5x^2+4...how can i use the quadratic formula to find irrational roots? i know that i need to transform x^4...but i don't know how... thanks $\displaystyle x^4-5x^2+4=0$ Let $\displaystyle y=x^2$ So $\displaystyle y^2-5y+4=0$ Solve for $\displaystyle y$, then go back and find $\displaystyle x$.
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