Learning goals: Teacher Facing Comprehend that equations containing a perfect-square expression on both sides of the equal sign can be solved by finding square roots. Comprehend that perfect squares of the form $(x+n)^2$ are equivalent to $x^2+2nx+n^2$. Use the structure of expressions to identify them as perfect squares. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from Alg1.7 Quadratic Equations, Algebra 1.