Question

3x²-4x-1=0 fórmula general. ​

Answer 1

Respuesta:

3x²-4x-1=0

a= 3

b= - 4

C= - 1

-b +- √b² - 4ac

----------------------- =

2a

-(-4)+-√(-4)²-4(3)(-1)

-------------------------------=

2(3)

4+- √16+12

------------------=

6

4+-√28

------------- =

6

(4+- 5,29)/6=

(4+5,29)/6=

X1= 9,29/6

X1= 1,548

X2= (4-5,29)/6

X2= - 1,29/6

X2= - 0,215.

Comprobamos

3x²-4x-1=0

3(1,548)²-4(1,548) - 1=0

3(2,396304) -6,192 - 1=0

7,19 - 7,19 =0

3x²-4x-1=0

3(-0,215)² - 4(-0,215) - 1=0

3(0,046225) + 0,86 - 1 =0

0,138675 + 0,86 - 1= 0

0,998 - 1 =0

1 - 1= 0

0=0.

Saludos❤️