Question

resolva a seguinte equação do 2 grau
a)3x^2-1 5x=0​

Answer 1

Resposta:

$x=\frac{-b \ \left \ {{+} \atop {-} }\sqrt{b^{2}-4ac } \right. }{2a} \\x=\frac{-(-15)\left \ {{+} \atop {-}} \right.\sqrt{15^{2} }-4.3.0 }{2.3} \\x=\frac{15\left \ {{+} \atop {-}} \right.\sqrt{225-0} }{6} \\x=\frac{15\left \ {{+} \atop {-}} \right.\sqrt{225} }{6} \\x=\frac{15\left \ {{+} \atop {-}} \right. 15}{6} \\x'=\frac{15+15}{6} =\frac{30}{6}=5\\\\x"=\frac{15-15}{6}=\frac{0}{6}=0$

Espero ter ajudado!!

Bons Estudos!!