Question

resolva
A ×2_3x-4=0​

Answer 1

VAMOS LÁ

Yare yare daze

x^2 - 3x - 4= 0

a = 1 , b = - 3 , c = - 4

Delta = (-3)^2 - 4.1.(-4) = 9 + 16 = 25

√Delta = 5

x = ( - b +/- √Delta)/2a

x = (-(-3) +/- 5)/2.1

x = (3 +/- 5)/2

x' = (3 + 5)/2 = 8/2 = 4

x" = (3 - 5)/2 = - 2/2 = - 1

Espero ter ajudado ^^