Question

5x²-3x-2=0 por favor me ajudem

Answer 1

soma e produto:

x'.x"=c/a=-2/5
x'+x"=-b/a=3/5

x'=1
x"=-2/5

báskara:

Δ=b²-4ac
Δ=(-3)²-4.5.-2
Δ=9+40
Δ=49

$x= \frac{-b \frac{+}{} \sqrt{49}}{2a}$
$x= \frac{3 \frac{+}{}7 }{10}$

$x'= \frac{3+7}{10}= \frac{10}{10}=1$
$x"= \frac{3-7}{10} = \frac{-4}{10}= \frac{-2}{5}$