Question 1119258
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<pre>
x^2 = 6x + d    ====>


x^2 - 6x - d = 0.


According to Vieta's theorem, the sum of the roots to this equation is equal to the coefficient at x with the opposite sign:


{{{alpha}}} + {{{beta}}} = 6  ====>


{{{beta}}} = 6 - {{{alpha}}} = 6 - (-3) = 9.


<U>Answer</U>.  The other root is 9.
</pre>

Solved.


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On Vieta's theorem, see the lesson

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/quadratic/lessons/Using-Vieta%27s-theorem-to-solve-qudratic-equations.lesson>Using Vieta's theorem to solve qudratic equations and related problems</A>

in this site.