Home » » What must be added to b2-3ab to make it a perfect square?

# What must be added to b2-3ab to make it a perfect square?

### Question

What must be added to b2-3ab to make it a perfect square?

### Options

A) -3a

B) -$$\frac{3}{2}$$

C) $$\frac{9}{4}$$

D) $$\frac{9a}{4}$$

E) $$\frac{9^2}{4}$$