Question 1147771
.


            Since the solution and the answer by @josgarithmetic both are WRONG,

            I came to bring the correct solution.



<pre>
{{{-0.5x^2+25x-225}}} = {{{0}}}

{{{0.5x^2-25x+225}}} = {{{0}}}

{{{x^2-50x+450}}} = {{{0}}}


{{{x[1,2]}}} = {{{(50 +- sqrt(2500-4*450))/2}}}


{{{x[1,2]}}} = {{{(50+- sqrt(700))/2}}}

{{{x[1,2]}}} = {{{(50+- 10*sqrt(7))/2}}}


{{{x[1,2]}}} = {{{25 +- 5*sqrt(7))}}}.      <U>ANSWER</U>
</pre>

Solved.