If a, b, c, and d are four different digits from 1 to 9, inclusive, then what's the largest possible value for the decimal a. b + c. d ?

For problems 29 - 31 the graph of a quadratic function y=ax^2 + bx + c is shown. tell whether the discriminant of ax^2 + bx + c = 0 is positive, negative, or zero.

What is the value of the discrimination for the quadratic equation 0=×2+2+×2

Factor this polynomial completely. 12x^2+ x-6