Which is another way to write the expression: d • (16 - 2)

a.
d - 16 - d - 2
b.
(d • 16) - (9 • 2)

c.
16 • 2 • d

d.
(6 • 2) - d

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 + 4x + 5 = 0