Attempt the question, check the explanation, and continue with similar questions to build confidence before exams.
Ax² + Ay² + Bx + Cy + D = 0
Ax + By + C = 0
x² + y² + D = 0
A(x - h)² + B(y - k)² = r²
Continue with nearby questions to strengthen the same chapter concept while you still have the context fresh in mind.