Explain the difference between 4 times the sum of x and y and the sum of 4 times x and u

The first question is adding x and y together, before multiplying it by 4.

The second question is 4 multiplies x, then y is added into 4x.

Step-by-step explanation:

4 multiplies the sum of x and y:

4 * (x+y)

The sum of [4 multiplies x and y]

4*x+y