AAL30_01 Question Working Answer Mark Notes 1 (a) 1 B1 cao x6−1 x5 (b) + 1 B1 cao y−2 y−5 −3 (c) 1 B1 cao v2 (d) 2 M1 for correct method for partial simplification w A1 for (accept w w) 2 (a) 2x 5 = 6y 2 M1 for correct method to rearrange to 6y=2x-5 or y=x+c − = A1 for oe y x − (b) = + 10 = + c 2 M1 for correct method to find gradient of line perpendicular to 5x + = y y x y −5x 10 A1 for = + c oe y x 3 (a) 4a² 4a 3 2 M1 for 3 terms correct out of 4 terms − − A1 cao (b) 3cd(3cd 8) 2 B2 for 3cd(3cd 8) − − (B1 for a correct but not fully factorised expression) (c) 25(4g2 25(2g + 2 B2 cao h2) h)(2g h) − − (B1 for 2 correct linear factors)
AAL30_01 Question Working Answer Mark Notes 1 (a) x6−1 x5 1 B1 cao (b) y−2 + −3 y−5 1 B1 cao (c) v2 1 B1 cao (d) w 2 M1 for correct method for partial simplification A1 for w (accept w) 2 (a) 2x − 5 = 6y y = x − 2 M1 for correct method to rearrange to 6y=2x-5 or y=x+c A1 for oe (b) y = −5x + 10 y = x + c 2 M1 for correct method to find gradient of line perpendicular to 5x + y = 10 A1 for y = x + c oe 3 (a) 4a² − 4a − 3 2 M1 for 3 terms correct out of 4 terms A1 cao (b) 3cd(3cd − 8) 2 B2 for 3cd(3cd − 8) (B1 for a correct but not fully factorised expression) (c) 25(4g2 − h2) 25(2g − h)(2g + h) 2 B2 cao (B1 for 2 correct linear factors)
algebra_level_3_mark_scheme_-_january_2014.docx