Question

f(x)=½x²+6x resolução pf

Answer 1

é só usar báskara
Δ=b²-4ac & x=-b+-√Δ/2a
a=1/2; b=6; c=0;
Δ=6²-4*(1/2)*0
Δ=36

$x= \frac{-6+- \sqrt{36} }{2*(1/2)}$
$x= \frac{-6+-6}{1}$
x1=-6+6=0
x2=-6-6=-12