Resoldre Equacions (4t ESO)

Resol:

 $3x^3+8x^2-13x=30$  

• x = 2, x = -3, x = -5/3

• x = -2, x = 3, x = 5/3

• x = 2, x = 3, x = -5/3

• x = 2, x = -3, x = 5

Resol:

 $2x^2-3\left(x+2\right)=x\left(x+3\right)-11$  

• x= -1, x = 5

• x= 2, x = 5

• x=1, x=5

• x=0, x= 1

Resol:

 $3\left(x-2\right)-12=3x-\left(2x+8\right)$  

• x=5, x= - 5

• x=0, x= 5

• x=0

• X= 5

Resol:

 $x^{5\ }-\ 7x^4+12x^3=0$  

• x=0 triple , x= - 3, x= - 4

• x = 4, x = 3, x = 0 triple

• x  = 0, x = 1, x =  3

• x = 4, x = 3

Resol:

 $x^6-1=0$  

• x = 1, x = 0

• x = 1, x = 2

• x= 1, x = -2

• x = 1, x =  -1

Resol:

 $\left(x-1\right)^2\left(x+2\right)\left(x-7\right)^3=0$  

• x = 0, x =  -1, x = 2, x= 7

• x=1 doble, x = -2, x = 7 triple

• x= - 1 , x = -2, x = 7 

• x= - 1 doble, x = 2, x = -7 triple

Resol:

 $-x^4-3x^3+6x^2-8x=0$  

• x = 0, x = 2

• x = 0, x=2, x = 5, x= 3

•  x= 2

• x = 0, x = -2

Resol:

 $x\left(x-2\right)^2=8x-16$  

• x = 2, x = 4

• x = 2, x = -2

• x = 2, x = -2, x = 4

• x = 2, x = -2, x = - 4

Resol:

 $5x^2\left(2x-1\right)\left(4x+3\right)^3=0$  

• x = 1/2 , x = -3/4 triple

• x = 1/2 , x = -3/4 triple , x = 0 doble

• x = 0  doble, x = -3/4

• x = -1/2 , x = 3/4 triple, x= 0 doble

Resol:

 $x^4-13x^2+36\ =\ 0$  

• x = 3, x = - 3, x = 4, x = - 4

• x = 9, x  = 4

• x = 3, x = - 3, x = 2, x = - 2

• x = 9, x = - 9, x = 4, x = - 4