Question

$x \times (2x - 1) + 6 = 4 \times (x + 1)$
​

Answer 1

x.(2x-1)+6=4.(x+1)

Aplique a distributiva:

2x²-x+6=4x+4

2x²-5x+2=0

Desenvolver a equação do segundo grau

∆=(-5)²-4.2.2

∆=25-16

∆=9

x'=-(-5)±√9/2.2

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

x''=5-3/4=2/4=1/2

S={2,1/2}