(x+ 1)？ = 169

x+ 1= 13

∴x= 12 or x=- 14.

(3) Solution: √2x? - 2x=0

x(√2x - 2)=0

X=0 or √2x-2=0

∴x=0 or x = 2

(4) Solution: Find the root formula △ = (-3)? - 4? 4? (-2)

=9+32=4 1

∴x=(3 √4 1)/2？ 4=(3 √4 1)/8