Question

z²+6z-8=0 by completing square method​

Answer 1

Step-by-step explanation:

z²+6z-8=0

z²+6z=8

add 9 both sides

z²+6z+9=9+8

z²+2×z×3 + 3²=17

(z+3)²=17

z+3=√17

z=±√17 -3

take +ve sign and -ve sign

z= √17 -3

and

z= -√17 -3

I hopes its helps u

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