Question

question
express ((x + 3)^2) as a trinomial in standard form.

Explanation:

Step1: Expand using square formula

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

Step2: Apply distributive property

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

Step3: Combine like terms

$x^2 + (3x+3x) + 9 = x^2 + 6x + 9$

Answer:

$x^2 + 6x + 9$