What is the point of this working? can you not just use the quadratic formula?? (1 Viewer)

[v.tex]

 

[v.tex]

Has any one come across questions in formal assessments where they ask u to use this method?? i find it really confusing

 

[liamkk112]

View attachment 46348

if you use the quadratic formula you have to calculate the square root of 4-4i (or 1-i). it's basically the exact same thing

 

[v.tex]

if you use the quadratic formula you have to calculate the square root of 4-4i (or 1-i). it's basically the exact same thing

Ok but if i find quadratic formula simpler in my mind and in terms of working out would it be fine if i just use it. Or should i try and master completing the square method aswell.

 

[liamkk112]

Ok but if i find quadratic formula simpler in my mind and in terms of working out would it be fine if i just use it. Or should i try and master completing the square method aswell.

usually they don't care, they'll just ask you to find the roots of the polynomial. completing the square is basically the same thing, the only extra step is adding the term on both sides of the equation