Express (x+11)^2 as a trinomial in standard form

To expand the expression (x + 11)^2, we can use the formula for squaring a binomial which is (a + b)^2 = a^2 + 2ab + b^2.

In this case, a = x and b = 11.
Therefore, we have (x + 11)^2 = x^2 + 2(x)(11) + 11^2.
Simplifying further, we get x^2 + 22x + 121.
So, the trinomial form of (x + 11)^2 in standard form is x^2 + 22x + 121.