Question 44862
x^2 - 17 x + 72 = 0
a=1 and b=-17 and c=72
{{{x = (-b +- sqrt( b^2 - 4*a*c ))/(2*a) }}}
{{{x = (17 +- sqrt( (-17)^2 - 4*72 ))/(2) }}}
{{{x = (17 +- sqrt( 289 - 288 ))/(2) }}}
{{{x = (17 +- 1)/(2) }}}
{{{x = (17 + 1)/(2) }}} and {{{x = (17 - 1)/(2) }}}
{{{x = (18)/(2) }}} and {{{x = (16)/(2) }}}
{{{x = 9}}} and {{{x = 8}}}
{{{ graph( 300, 600, 5, 15, -10, 10, x^2 - 17x + 72) }}}