Question

Me ajudeemmm por favooor

Answer 1

4)

| 1 0 1 | 1 0

| 2 1 x | 2 1

| 0 1 2 | 0 1

2 + 0 + 2 - (0 + x + 0) = 0

4 + x = 0

x = - 4

5)

a)

| 2 4 1 | 2 4

| 2 4 x | 2 4

| 3 1 2 | 3 1

16 + 12x + 2 - (12 + 2x + 16) = 0

18 + 12x - 2x - 28 = 0

10x - 10 = 0

10x = 10

x = 1

b)

| 2 3 -2 | 2 3

| 0 1 x | 0 1

| 2 x -3 | 2 x

-6 + 6x + 0 - (-4 + 2x² + 0) = 2

6x - 6 + 4 - 2x² = 2

-2x² + 6x - 2 = 2

-x² + 3x - 2 = 0

x' = 1

x" = 2

c)

| x+1 3 x | x+1 3

| 3 x 1 | 3. x

| x 2 x-1 | x. 2

x(x²-1) + 3x + 6x - (x³ + 2x + 2 + 9x - 9) = 0

x³ - x + 9x - 9x - x³ + 7 = 0

-x + 7 = 0

x = 7