Question

 determine a raiz 3x²-7x+2=0

Answer 1

aplique a fórmula de Bhaskara, assim:
delta = -7/\ - 4X3X2
delta = 25
25 é raiz de 5 então
X = 7 + ou -5/6
X1 = 2
X2 = 1/3

X1 e X2 são as raízes :)

Answer 2

∆=(7)$^{2}$-4.3.2
∆=49-24
∆=25
∆=5
$x= \frac{7+-5}{6}$
$x'= \frac{7+5}{6}$
$x'= \frac{12}{6}$
$x'=2$
$x"= \frac{7-5}{6}$
$x"=\frac{2 ^{:2} }{6 ^{:2} }$
$x"= \frac{1}{3}$
V={2,1/3}