Understand the concept
Identities are true for all permitted values.
Expand (x + 3)²
- Step 1: Use a² + 2ab + b² with a=x b=3.
Final answer: x² + 6x + 9
Expand (y − 2)²
Show the answer
y² − 4y + 4
Try another similar question and explain each step aloud. Refer to your school syllabus for topic level and notation.