Question

          
 calcule a raiz 
f(x)=x² +5x+6

Answer 1

f(x)=x²+5x+6
a=1
b=5
c=6

$x= \frac{-b\pm \sqrt{b^2-4ac} }{2a} = \frac{-5\pm \sqrt{25-24} }{2} = \frac{-5\pm \sqrt{1} }{2}=$

$x= \frac{-5\pm1}{2}$

$x'= \frac{-5+1}{2} =- \frac{4}{2} =-2$

$x"= \frac{-5-1}{2} =- \frac{6}{2} =-3$

S={-3,-2}