Question

X(4x-1)=3(x+1)
a)1,5
b)21,5
c)0,5
d)2.5

Answer 1

x(4x - 1) = 3(x + 1)

4x² - x = 3x + 3

4x² - x - 3x = 3

4x² - 4x = 3

x² - x = 3/4

x² - x + 1/4 = 3/4 + 1/4

(x - 1/2)² = 4/4

x - 1/2 = ± 1

x = 1/2 ± 1

x = 0,5 + 1

x = 1,5

Resposta: a)1,5