b) If 2* = 64, the value of x² + 2x is Solution:. Created by fdxd.

[tex]2 {}^{x} = 64 \\ 2 {}^{x} = {2}^{6} \\ x = 6 \\ {x}^{2} + 2x = {6}^{2} + 2 \times 6 = 36 + 12 = 48[/tex]Anser: 48