M1 for 20c 12d 7c or better or – – W1 for 13c or 12d seen as terms in final – answer (b) www 1 m(m n) – [3] 12. 2x2 + 3xy or + 3y) B2 x(2x B1 for 3x2 + 3xy or – x2 + 3y) seen. x(3x x – SC1 for answer 2x2 3xy o.e. – or 2x2 seen in final answer of 2 terms. [2]
M1 for 20c – 12d – 7c or better or W1 for 13c or – 12d seen as terms in final answer (b) m(m – n) www 1 [3] 12. 2x2 + 3xy or x(2x + 3y) B2 B1 for 3x2 – x2 + 3xy or x(3x – x + 3y) seen. SC1 for answer 2x2 – 3xy o.e. or 2x2 seen in final answer of 2 terms. [2]
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