## Algebra 2 (1st Edition)

Using the equation for the area of a square and factoring: $$30=(x)(3x+1) \\ 30=3x^2 +x \\ 0 = 3x^2 +x -30 \\0=( 3x+10)(x−3)\\x=3$$ **Note, we only consider the positive solution since length cannot be negative.