Question

2x ao quadrado - 3 = x

Answer 1

2x²-3=x

2x²-x-3=0
a=2 b= -1 c= -3

∆= b²-4.a.c
∆= -1²-4.2.(-3)
∆= 1+24
∆= 25

x= -b±√∆
2.a
x= -(-1)±√25
2.2
x= 1±5
4

x'= 1+5= 6²= 3
4 = 4²= 2

x"= 1-5= 4²=2²= 1
4 = 4²=2²=