How to Solve Cubic Equations - Easy Factoring Method

[williambunter]

Wonderful! I could not have solved this by myself. So I have learned something new! Thank you again, sir.

[ChavoMysterio]

x^2-2x+4=0
x^2-2x=-4
x^2-2x+1=-4+1
(x-1)^2=-3
|x-1|=i√3
x-1=±i√3
x=1±i√3

On the two complex solutions, I could have completed the square.

[theophonchana]

Square root of 12 = 2 × square root of 3

[shayaanhaider]

mentally solve it, it is x="
plus minus"2