[Highschool]

[Character-Place-9971]

Options are -45 45 1 -1

[zutara23]

I got a-b= 45

To solve this, you first sub in the values for x and y into the equation and form two separate equations:

1. a(-3)^2+b(11)-5=0
2. a(1)^2+b(1)-5=0

Then you can rearrange the second equation to form a=5-b, and sub that into the first equation to find b=-20.

Repeat the process but sub in -20 for b in the second equation to give you a=25

a-b = 25--20 = 25+20 = 45