Question

Escreva as equações do 2º grau na forma geral:

a) 5x² - 9x + 8 = 2 – x²

b) (2x + 3)² = 10 – (x + 4)(x – 2)

c) x² - 1 = x + 11

d) x(x – 3) + (x – 1)(x – 4) = 0

e) (x – 3)² + (x + 2)² = 10

f) (2x + 3)² = 10 – (x + 4)(x – 2)

g) 5x² - 3x + 1 = 3x² - 6x - 5​

Answer 1

a) 5x² - 9x + 8 = 2 – x²

10x - 9x + 2x = -8 + 2

3x= -6

x = -6/3

x = 2

b)n soube desculpa

c) x² - 1 = x + 11

2x - x = 1 + 11

x= 12

d) x(x – 3) + (x – 1)(x – 4) = 0

2x - 3 + x - x - 4 = 0

2x + x - x = 4 + 3

3x - x = 7

2x = 7

x = 7/2

x = 3.5

g) 5x² - 3x + 1 = 3x² - 6x - 5

10x - 3x - 6x - 7x = - 1 - 5

10x - 9x - 7x = - 6

10x -16x = - 6

- 6x = -6 (-1)

6x = 6

x = 6/6

x = 1

so sobe essas sorry