Answer:
Explanation:
the system is :
y=x²+10x+11 ...(1)
y=x²+x-7.....(2)
by (1) and (2) : x²+10x+11 = x²+x-7
10x+11 = x - 7
10x - x = -7 -11
9x = -18
x = -18/9 = -2
put this value in (1) or (2) : y=(-2)²+(-2)-7 = 4 -9 = -5
single solution for this system : (-2 ; -5)