IGCSE Booklet 16 – Expanding and Factorising | Original 21-page PDF

Exact unchanged original IGCSE Booklet 16 – Expanding and Factorising | Original 21-page PDF.

Keep the original page, question and subpart numbers when following the matching lesson recordings. Each recording may cover selected examples; the complete PDF includes additional practice. This is the original teaching booklet, with its original historical labels and layout.

Spiral learning connection: connect these skills to earlier number, algebra and modelling ideas, then return to them in later problems.

Original-edition clarifications (the PDF itself is unchanged):

• Page 3, Q2: the printed answer omits a plus sign. (2x + 3)(3x − 1) = 6x² + 7x − 3.

• Page 4, Q3(g): the correct expansion is y + 2x − xy² − 2x²y. The final x is squared; the printed answer omits that square. The corresponding recording writes the correct expansion.

• Page 6, Q4(d): 8x² + 4x + 16y² + 12y = 4(2x² + x + 4y² + 3y), rather than the printed final 2y.

• For page 11, Q9(b), the difference of triple products simplifies to (n + 1)(n + 2). The recording stops before that last simplification.