What do they have in common - is it right angles?

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

Astore sells a 28 oz. bottle of shampoo for $1.96. it also sells a 22oz. bottle of shampoo for $1.92 which bottle is the better deal?

Consider the equation of the line, c(c2 + 2)y = c − x where c > 0 is a constant. (a) find the coordinates of the x-intercept and the y-intercept. x-intercept ( , ) y-intercept ( , ) (b) find a formula for the area of the triangle enclosed between the line, the x-axis, and the y-axis. a(c) =