Expand: 3(x + 2)

The "3" on the outside must multiply both terms inside the brackets.

Expand: (x + 5)x

Even though the brackets appear first, you still multiply the outside "x" with both terms inside the brackets.

Expand: x(x - y)

The "x" on the outside must multiply both terms inside the brackets.

Expand: -3a²(3 - b)

Both terms inside the brackets must be multiplied by "-3a²"