Question

RESOLVA AS EQUAÇÕES DE 2o GRAU
1) x2 - 5x + 6 = 0
2) x2 - 8x + 12 = 0
3) x2 + 2x - 8 = 0
4) x2 + 3x - 28 = 0
5) 2x2 - 8x + 8 = 0

Answer 1

Olá✨

1) x2 - 5x + 6 = 0

2x - 5x + 6 = 0

-3x + 6 = 0

-3x = -6

x = 2

2)x2 - 8x + 12 = 0

2x - 8x + 12= 0

-6x + 12 = 0

-6x = -12

x = 2

3) x2 + 2x - 8 = 0

2x - 2x - 8 = 0

4x - 8 = 0

4x = 8

x= 2

4)x2 + 3x - 28 = 0

2x + 3x - 28 = 0

5x - 28 = 0

5x = 28 ou 28/5

5) 2x2 - 8x + 8 = 0

4x - 8x + 8 = 0

- 4x + 8 = 0

- 4x = -8

x = 2