Express as a trinomial.

(2x+1)(x+9)

Answer:

2x^2 + 19x + 9

Step-by-step explanation:

Using the FOIL method (ask me via comments if you don't know what it is), we expand it to 2x^2 + 18x + x + 9, then we add like terms, equal to 2x^2 + 19x + 9.

The trinomial expression for (2x + 1)(x + 9) is [tex]2x^2 + 19x + 9[/tex].

To express (2x + 1)(x + 9) as a trinomial, you need to perform the multiplication.

Distribute each term from the first parenthesis to each term in the second parenthesis:

(2x + 1)(x + 9) = 2x * x + 2x * 9 + 1 * x + 1 * 9

Now, simplify the expression:

[tex]= 2x^2 + 18x + x + 9[/tex]

Finally, combine like terms:

[tex]= 2x^2 + 19x + 9[/tex]

So, (2x + 1)(x + 9) expressed as a trinomial is [tex]2x^2 + 19x + 9.[/tex]

To know more about trinomial, refer here:

https://brainly.com/question/16347049

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