Question

Resolva as equações:

a) X + 3 - 2x = 0
3

b) 2x² - 3x + 1 = 0
2 4

Answer 1

a) x+3-2x=0
x-2x=-3
-x= -3 (-1)
x= 3

b)2x²-3x+1=0
∆=(-3)²-4.2.1
∆=9-8
∆=1
x=3±√1/2.2
x=3±1/4
x1=3+1/4
x1=1
x2=3-1/4
x2=1/2