Maths a Answers
Chapter 1
c i Noxintercept,y=4
iii
y
Pretest
1 a 2x + 1
1
3
c x+ x= x
2
2
f 3x − 7
b 5(x − 1)
1
(x + 4)
3
5ab
21x
4x + 4
3
ii 0
y=4
d 2x − 3
e
a
a
a
a
7x
8y
3x + 3
4m
b
b
b
b
6a
7
6
b
7
12
9 a 3
b 2
c 1
10a y=2x +1 b y= x +5
c
4
7
d
19
72
Exercise1A
f
21
20
2
3
4
5
4
e
7
c
c
c
c
5x 2
15a 2
10x + 2x 2
a
(0, 4)
d
g
c 10
ii 1
4
5
6
7
y
y=x+4
(0, 4)
(4, 0)
x
0
b i x = 3, y = 2
ii
iii
2x
3
1 C
2 D
3 a 7
49
3
h
4
9
7a4
b7
8 a i x = 4, y = 4
iii
x
0
2
3
1
e
2
a Yes
a 9
a 10a
e 4ab
i 3m2n
m 3a+7b
q 5st− s 2t
a 12ab
e 30ht
i 8a 2b 4
b 1
f
b
b
b
f
j
n
r
b
f
j
c 4
1
g

5
Yes
c
8
c
15d
c
9t
g
0.7a 2b k
8jk−7j o
3x 3y 4+2xy 2
25ab
c
30bl
g
24p3q
k
(3, 0)
(0, 2)
0
2x
3
6ad
12s 2t
18h5i 5
d 10hm
h 21b 2d 5
l 63m 2pr
m x
n 3ab
a
o
3
p 
ab
4
q 2b
r 3x
s
y
2
t
a
2
y
y=
d 9
2
7
h 7
3
No
8
d 9
0
d 5xy
9b
h st 2
2gh+5
l 12xy−3y
ab 2+10a 2b p 2mn−m 2n
−2
x
8 a 5x +5
d 20−5b
g 6m+18
j 2x2+10x
m 15y2+3yz−24y
b 2x +8
c 3x −15
e 2y+6
f 7a−7c
h 4m−12n+20 i 2p+6q+4
k 6a2−24a
l 12x2+16xy
n 36g−18g2−45gh
676
ISBN 9780521178662
© David Greenwood, Sara Woolley, Jenny Goodman, Jennifer Vaughan, GT Installations, Georgia Sotiriou, Voula Sotiriou 2011 Cambridge University Press Photocopying is restricted under law and this material must not be transferred to another party.
6 a
x −1
2x
e 5
1
2
7 a 3
x +4
5x
5a
f
2
b
Answers
o 8ab + 14a 2 − 20a
p 14y 2 − 14y3 − 28y
3
2
q 6a +3a +3a
r 5t4 − 6t3 − 2t
9 a 5x+ 23
b 10a + 26 c 21y + 3
d 15m + 6
e 10
f 11t − 1
g 3x 2 + 15x h 15z− 7
i 11d3
j 9q4 − 9q3
10a 3(x− 3)
b 4(x− 2) c 10(y + 2)
d 6(y + 5)
e x(x+7) f 2a(a + 4) g 5x(x− 1)
h 9y(y − 7)
i xy(1−y) j x 2y(1 − 4y)k 8a 2(b + 5) l ab(7a + 1)
m 5t(t+1) n 6mn(1 + 3n)
o y(y + 8z) p 3a(ab + 2b+ 1)
11 a 32
b 7
c 61
d 12
13
1
7
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