Maths a Answers

Topics: Triangle, Angle, Quadrilateral Pages: 446 (23305 words) Published: February 19, 2013
Answers
Chapter 1
c i Nox-intercept,y=4
iii
y

Pre-test
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
8jk7j 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 12xy3y
ab 2+10a 2b p 2mnm 2n

−2

x

8 a 5x +5
d -205b
g 6m+18
j 2x2+10x
m 15y2+3yz24y

b 2x +8
c 3x −15
e -2y+6
f -7a7c
h 4m12n+20 i -2p+6q+4
k 6a224a
l -12x2+16xy
n 36g18g245gh

676
ISBN 978-0-521-17866-2
© 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(1y) 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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