if r and s are roots of the equation 3x^2 - 7x +1 =0 compute r^3 s + rs^3. How do i know which is r and which is s? thanks!!!
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Originally Posted by mmathh find the roots of 3x^2 - 7x +1 =0 thanks!!! use the quadratic formula
Originally Posted by mmathh How do i know which is r and which is s? Notice that in the equation you gave, $\displaystyle r^3s+rs^3$, it doesn't matter which of the two roots you assign to s or r, the answer you will get at the end will be the same, so you can set r and s however you want to.
heh heh yeah i totally noticed that right after i posted it...thanks! i feel dumb. hehe
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