Question 1040301
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r2 - 10r = -17
plz help me...
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<pre>
{{{r2 - 10r}}} = {{{-17}}},

{{{r2 - 10r +17}}} = {{{0}}}.

Apply the quadratic formula. See the lessons

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/quadratic/lessons/Introduction-Into-Quadratics.lesson>Introduction into Quadratic Equations</A>

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/quadratic/lessons/proof-of-quadratic-by-completing-the-square.lesson>PROOF of quadratic formula by completing the square</A>

in this site.

{{{r[1,2]}}} = {{{(10 +- sqrt(10^2 - 4*1*17))/2}}} = {{{(10 +- sqrt(32))/2}}} = {{{(10 +- 4*sqrt(2))/2}}} = {{{5 +- 2*sqrt(2)}}}.
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