Match the name of the expression to the best example of that expression.
Recall the form of a general quadratic expression is ax^2 + bx + c
1. a = 1
2. a > 1
3. Perfect square trinomial
4. Difference of Two Squares
a. 25x^2 - 30x + 9
b. 2x^2 - 10x - 3
c. 81x^2 - 16
d. x^2 - x - 12
1. d. x^2 - x - 12
2. b. 2x^2 - 10x - 3
3. c. 81x^2 - 16
4. a. 25x^2 - 30x + 9