Answer:
7/13
Step-by-step explanation:
The y has to be negative but the x positive. So that leaves only (3,-4)
3,6,-2
a+2a+b = 7
2a^2b = -36
a*2a + ab + 2ab = 0
or, a(2a+3b) = 0
so, b = -2a/3
Solve those and you find 3,6,-2
