What is 3x (x+1) in expanded form

Answer:3x^2+3x

Step-by-step explanation:

3x=3x+0

(3x+0) (x+1)

Multiply the numbers on the left of the plus signs within each parentheses.

3x*x = 3x^2

Then the left of the plus sign in the 1st set by the right in the 2nd set.

3x*1 = 3x

Then right if first by left of second

0*x=0

Right of 1st and right of 2nd.

0*1=0

Now add each piece.

3x^2+3x+0x+0

Simplify

3x^2+3x