## Algebra 1

$6x+9$
Subtract the area of the small square from the area of the large square to find the area of the shaded region. Remember that the square of a binomial is the square of the first term, plus twice the product of the two terms, plus the square of the second term. $(x+3)^2-x^2\longrightarrow$ square the binomial =$x^2+6x+9-x^2\longrightarrow$ combine like terms =$6x+9$