Question

como resolvo essa equacão do 2° grau: X(4X - 1 ) = 3

Answer 1

x(4 x - 1 ) = 3
4 x² - x = 3
4 x² - x - 3 = 0
Δ =b² - 4 a .
Δ = -1² - 4 .4 . - 3
Δ = 1 + 48
Δ = 49
\/¨¨49 =7
x = -b +ou-7/2.4
x = -(-1) +ou- 7/8
x = 1 +7 /8
x = 8/8⇒1
x = 1-7/8
x =-6/8⇒-3/4
S= {- 3/4,1}