Mathematics - Algebra - Quadratics - Completing the square - Complete the Square Drill

8 problems. Scaffolded format: 'x²+8x+__=7+__'. Fill in what to add (16). Then: '(x+__)²=___'. Then solve. Progress to less scaffolding. Include: leading coefficient ≠ 1 (divide through first), negative x-coefficient, and writing equations in vertex form y=a(x-h)²+k.