If x * y = xy -2 (x + y)

Question

If x * y = xy -2 (x + y) for all integers x and y, the 2 * -3 =

A) -16

B) -11

C) -4

D) 4

E) 16

sashiim20 · Answer

x * y = xy -2 (x + y)

2 * -3 = (2)(-3) - 2(2+(-3))

-6 -2(2-3)

-6-2(-1)

-6 + 2 = -4

Answer (C)...

ydmuley · Answer

x * y = xy -2 (x + y)

2 * -3 =

2(-3) - 2 (2-(-3)

= -6 - 2(-1)

= -6 +2

= - 4

Hence, Answer is C

JeffTargetTestPrep · Answer

We let x = 2 and y = -3, and then we substitute those values for x and y into the expression xy - 2(x + y):

2 * -3 = (2)(-3) - 2(2 + (-3)) = -6 - 2(-1) = -6 + 2 = -4

Answer: C

TimeTraveller · Answer

If  x = 2, y = -3: -6 - 2(2-3) = -6 +2 = -4

If  x = -3, y = 2: -6 -2(-3+2) = -6+2 = -4.

Ans - C.

Abhishek009 · Answer

2 * -3 = 2 * -3 -2(2 - 3)

Or,  2 * -3 =-6 + 2

Or,  2 * -3 =-4 , Answer must be (C)

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