Question 163637
{{{(10-x-2x^2)/(2x^2 -9x+10)}}}
={{{-(2x^2+x-10)/(2x^2-9x+10)}}}
={{{-((2x+5)(x-2))/((2x-5)(x-2))}}}
={{{-((2x+5)cross((x-2)))/((2x-5)cross((x-2)))}}}
={{{-(2x+5)/(2x-5)}}}