Question

What is (x+y+3)(y+1)

Answer 1

Answer:

3 + x + xy + 3y + y² +y

Step-by-step explanation:

You have to have multiplied every number with every number in the other parentheses:

y · x = xy, y · y = y², y · 3 = 3y

1 · x = x, 1 · y = y, 1 · 3 = 3

Now, add the products together and simplify:

xy + y² + 3y + x + y + 3

3 + x + xy + 3y + y² +y             <===  since no like terms can be combined, just                      

                                        put them in alphabetical order for easier organization

Answer 2

I have no idea, hope this helps!