If AB is opposite to each other, AC is reciprocal to each other, and the square of X is equal to four, find the square of x minus 3A + ab-3b of X + B of a to the power of 2007 Trouble! Hurry

If AB is opposite to each other, AC is reciprocal to each other, and the square of X is equal to four, find the square of x minus 3A + ab-3b of X + B of a to the power of 2007 Trouble! Hurry

If AB is opposite to each other, a + B = 0, B / a = - 1
If AC is reciprocal, AC = 1, then AB = - 1
The square of X is four, x = plus or minus two
The square of x minus 3A + ab-3b of X + B of a to the power of 2007
=4-3a+ab/x-3b+(-1)^2007
=3-3(a+b)+ab/x
=3-(1/x)
When x = 2, the original formula is 5 / 2
When x = - 2, the original formula is 7 / 2