The following operation is incorrect () A. x2•x3=x5B. (x2)3=x6C. x3+x3=2x6D. (-2x)3=-8x3

The following operation is incorrect () A. x2•x3=x5B. (x2)3=x6C. x3+x3=2x6D. (-2x)3=-8x3

A. X 2 · x 3 = x 5, correct; B, (x 2) 3 = x 6, correct; C, should be x 3 + x 3 = 2x3, so this option is wrong; D, (- 2x) 3 = - 8x3, correct