(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