Around 42310.
I just multiplied the numbers by its number place format.
I^3=-i
therefor -27i=(3i)^3
so we can get a sum of 2 perfect cubes
a^3+b^3=(a+b)(a^2-ab+b^2)
so
remember that i²=-1
x^3+(3i)^3=(x+3i)(x²-3xi-1)
Slope
y2-y1/x2-x1
11+5/7-3
4
now plug and chug with -5=4(3)+b