This deep dive covers The FOIL Method for Expanding within Quadratic Expressions for GCSE Mathematics. Revise Quadratic Expressions in Algebra for GCSE Mathematics with 12 exam-style questions and 22 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 3 of 7 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 3 of 7
Practice
12 questions
Recall
22 flashcards
The FOIL Method for Expanding
FOIL stands for: First, Outer, Inner, Last
To expand (x + 3)(x + 5):
- First: x × x = x²
- Outer: x × 5 = 5x
- Inner: 3 × x = 3x
- Last: 3 × 5 = 15
Combine: x² + 5x + 3x + 15 = x² + 8x + 15