Question

How to simplify the expression (x+4)*(3x+5)

Answer 1

You use PEMDAS.

First, parentheses
(x+4) = 4x
(3x+5) = 3x+5

So, that is
4x*3x+5

Then, exponents. We don’t have any.

Then, multiplying.

4x*3x is 12x

So, 12x+5

And then, division. We don’t have anything to divide.

Then, addition and subtraction

You can’t add the variable to a number, so the answer is just

12x+5.

Hope it helped. :)

Answer 2

(x+4)*(3x+5)
distributive property
x(3x+5)+ 4(3x+5)
3x²+5x+12x+20
add like terms
3x²+17x+20

if thats what u were asking for