Answer:
it would be (10)- (4)
Step-by-step explanation:
The first one is -1/2
the second one is x+2y-27=0
10x-22
((x+2)(x-1))-((x-4)(x-5))
(x^2-x-2)-(x^2-9x+20)
x^2 + x - 2
+ (-x^2+9x-20)
_______________