Answer:
80
Step-by-step explanation:
I hope this will help. I was really calculating maybe keep on trying on A peice of paper.:)
N is greater than or equal to -10
For these kinds of expressions use FOIL (first, outside, inside, last).
-2x • 9x = -18x^2
-2x • -3y = 6xy
8y • 9x = 72 xy
8y • -3y = -24y^2
Now combine them all:
-18x^2 + 78xy - 24y^2
