Question

Determine as raízes da equação
9x2
– 12x + 4 = 0 :​

Answer 1

Resposta:

9x² - 12x + 4 = 0

(A=9, B= -12, C=4)

∆= b² - 4ac

∆=(-12)² - 4 . 9 .4

∆=144 - 144

∆=0

x=-b ± √∆ / 2a

x= - (-12) ± √0 / 2 . 9

×= 12 ± 0 / 18

x'=

\frac{12 + 0}{18} = \frac{12}{18} = \frac{2}{3}1812+0=1812=32

x''=

\frac{12 - 0}{18} = \frac{12}{18} = \frac{2}{3}1812−0=1812=32

S=

\frac{2}{3}32

Answer 2

Explicação passo-a-passo:

9x² - 12x +4=0

a= 9

b= -12

c= 4

∆= (-12)² - 4.9.4

∆= 144 - 144

∆=0

x= - (-12) ±√0/2.9

x= 12/18

x= 4/6

x= 2/3

S = { 2/3}