Question

Escreva as equações na forma reduzida.

a) (x – 1) . (x + 1) = 2 . (x – 1)

b) (5 – x) . (8 – x) = 4

c) (2x + 1) . (x – 2) = x + 5

d) x2 - 5x = x -1

e) x2 - (x – 3) . (5x – 2) = 2x

f) (x + 3) . (2x + 10) = 9

Answer 1

Resposta:

a) x² - 1² = 2x - 2

x² - 1 = 2x - 2

x² - 2x = 1 - 2

x ² -2x = -1