Question

Calcule o Zero da função f(x)=12x²+5x ?

Answer 1

$f(x)=12x^2+5x\\\\ 12x^2+5x=0\\\\ Por~~Evid\^encia:\\\\\\ x(12x+5)=0\\\\ \boxed{x=0}\\ 12x+5=0\to~~ 12x=-5\to~~\boxed{x=- \dfrac{5}{12} }\\\\\\\\ \large\boxed{S=\left\{ -\dfrac{5}{12}~;~0\right\}}$