Question

(z-4)^2=18

Answer 1

solving quadratic equation

Answer 2

factor out lft side -
set to 0
apply quad formula

do you know th eformula

Answer 3

z^2 - 8z + 16 = 18
z^2 - 8z - 2 = 0

now use quadratic formula n u will get the answer

Answer 4

u should get
\[4 \pm 3\sqrt{2}\]