2 (6) - 3 (-3) , 12 - -9 , 12 + 9 , 21
let's recall that to find the inverse of any expression, we start off by doing a quick switcheroo on the variables, and then solve for "y".

X2 + 12 = 7x x2 – 7x + 12 = 0factor the equation (x – 3 ) ( x – 4 ) = 0 Then equating both factor to 0 X – 3 = 0 X = 3 And X – 4 = 0 X = 4 So the answer is X = 3 X =4
I’m pretty sure the answer is 16, I’m very sorry if this is incorrect.