Question

ax+b < 0 is strict inequality
ax^2 +bx + c > 0 is slack inequality, what does this mean?

Answer 1

Solve the following system of equations:

x − 2y = 14
x + 3y = 9

Answer 2

I would have said both were strict.
(You can introduce a slack variable to an inequality for some purposes).

Answer 3

@Zahabaha
x-2y=14
x+3y=9
taking the first equation
x-2y=14
x=14+2y
putting this value in the second equation
x+3y=9
(14+2y)+3y=9
14+5y=9
5y=9-14
5y=-5
dividing both sides by 5, we get
y=-1
putting the value of y in x
x=14+2y
x=14-2
x=12