Question

question
express as a trinomial.
(3x + 9)(x + 1)
answer
submit answer

Explanation:

Step1: Apply FOIL method

$(3x+9)(x+1) = 3x\cdot x + 3x\cdot1 + 9\cdot x + 9\cdot1$

Step2: Calculate each term

$= 3x^2 + 3x + 9x + 9$

Step3: Combine like terms

$= 3x^2 + (3x+9x) + 9 = 3x^2 + 12x + 9$

Answer:

$3x^2 + 12x + 9$