(4d+1)
-1
(9-d^{2})
(3-d)
(3+d)
(2d+5)^2
(2d-5)^2
(d^{2}+9)
2
A
B
C
D
Leave blank
(x+2)^{2}+13
x
x^{2}-2x-4
(x+13)(x-15)
y=4
y=-\frac{1}{3}
x=0
y=0
x=3
x=\frac{1}{4}