Question 246161
f(x)=x^2-7x+9
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
X=(7+-SQRT[-7^2-4*1*9])/2*1
X=(7+-SQRT[49-36])/2
X=(7+-SQRT13)/2
X=(7+-3.60555)/2
X=(7+3.60555)/2
X=10.60555/2
X=5.3 ANS.
X=(7-3.60555)/2
X=3.39/2
X=1.695 ANS.