Mathematics · Oct / Nov 2022 · Paper 21 · Question 20
0580
As printed in the paper
The question as text
Factorise completely.
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
20(a)[2]
( + )( − ) 1 x 1 y final answer [2]
B1 for + − ( + ) 1 x y 1 x or 1 – y + x(1 – y)
20(b)[3]
( + )( − ) 2 x x 3 y x 3 y final answer [3]
( ) 3
B2 for 2 x x 2 − 9 y 2 or correctly factorising into two brackets e.g. ) ( ( )( )( 2 + − 2 − + ) 2 x 6 xy x 3 y , x 3 xy 2 x 6 y
or B1 for ( ) or ( ) 2 x 3 − 9 xy 2 x 2 x 2 − 18 y 2 or for ( )( ) + − x 3 y x 3 y
Make a free account to save your answers and see your weak topics and ask the AI why a wrong answer is wrong.