Answer:
x² + 7x + 12
Step-by-step explanation:
You are given two different binomials. Use FOIL to multiply, because product means to multiply.
First:
x · x = x²
Outside:
x · 4 = 4x
Inside:
3 · x = 3x
Last:
3 · 4 = 12
Now, add all these terms together to get this:
x² + 4x + 3x + 12
Combine like terms (add the terms with x's):
x² + 7x + 12
And you're done!
*This is a trinomial because there are three terms.
