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If X (ast) Y = X + Y – XY, find x when (x (ast)…

If X (ast) Y = X + Y – XY, find x when (x (ast) 2) + (x (ast) 3) = 68
  • A.
    24
  • B.
    22
  • C.
    -12
  • D.
    -21
Correct Answer: Option D
Explanation

x (ast) y = x + y – xy
(x (ast) 2) + (x (ast) 3) = 68
= x + 2 – 2x + x + 3 – 3x
= 86
3x = 63
x = -21