We want to add something to the right side of the equation to get 81.
x^2 - 18x + 81 = 23
The final step is to factor and subtract 23. (Subtracting 23 is a unnecessary, but whatever)
(x - 9)^2 - 23 = 0
So "x" = 9 + sqrt23
18 divided by 4 this equals 4 with a remainder of 2 so i guess the 2 go in another row
So, you start by separating the equation into two inequalities and you get
4x+1 > -7 and 4x +1 < 5
Solve these inequalities and you get your final answer:
x > -2 and x < 1
(The equalities symbols are supposed to have the "or equal" line beneath them, I was just too lazy to put them.)
Y + 5 = 2(x - 3)
y + 5 = 2x - 6
2x - y = 11 <.......standard form