Question

-5x² - 3x + 2=0 ......​

Answer 1

Explicação passo-a-passo:

-5x² -3x +2=0 (×-1)

5x² +3x -2=0

∆= 3² -4.5.(-2)

∆= 9 + 40

∆= 49

x= - 3 ±√49/2.5

x= - 3 ± 7 /10

x1= -3+7/10= 4/10= 2/5

x2= -3-7/10= -10/10= - 1

S= { - 1, 2/5}