Gcse Maths Tutor: Algebra Substitution/evaluation
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Algebra - substitution
evaluation of expressions
GCSE Maths Tutor
1. evaluate when
www.gcsemathstutor.com
x = 1,
(i) 3xy
question sheet 01 [email protected]
y = 2 and z = 3 (ii) 2z
(iii)
9 yz
yz
(v) 2 y + 4 z
(vi) x + 3 y − 2 z
(vii) yz + xz
(viii) y 2 + z 2
(ix) 2 x 2 + y
(x) 2y 2 − z 3
(xi) y 2 z
(xii) 3y 2 z 2
(iv)
14
2. evaluate when
(i)
(iv)
p = 4,
p 2 + q3 − r 2 + 3 pqr p q r − + r p q
(vii) 3 p 2 + 2q − 2 pq 2 r
(x)
p + 2q
r −q
−
p+r p+q
GCSE Maths Tutor
q = 5 and r = 6 (ii) ( p − q + r )(2q − 4r )
(iii) ( p − r )2 + (q − p)2
p −1 q − r − 3 2
(vi)
(viii) p 2 + 2q3 − 2r 2
(ix)
(v)
r
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p+q
r
p−q 3
−
pq + r p
p2 − q2 p − r 2 (xii) − r r + 2p
3r + 2 p 2q −
pq − r
−
4
2
(xi)
r+ p
[email protected]
ref. alg/substitution/02/2008
Algebra - substitution GCSE Maths Tutor
evaluation of expressions www.gcsemathstutor.com
answer sheet 01 [email protected]
1. (ii)
6
(iii)
3 2
(v)
16
(vi)
1
(vii) 9
(viii) 13
(ix)
4
(x) -19
(xi)
(xii)
108
(i)
(iv)
6 3 7
12
2.
(i) 465
(iv)
37 60
(vii) -1142
(x) 12 89
(ii) -70
(iii) 5
(v) 1 12
(vi)
(viii) 194
(ix) -5
13 21
11 (xii) 3 14
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[email protected]
(xi) 6
GCSE Maths Tutor
2 56
ref. alg/substitution/02/2008
evaluation of expressions
GCSE Maths Tutor
1. evaluate when
www.gcsemathstutor.com
x = 1,
(i) 3xy
question sheet 01 [email protected]
y = 2 and z = 3 (ii) 2z
(iii)
9 yz
yz
(v) 2 y + 4 z
(vi) x + 3 y − 2 z
(vii) yz + xz
(viii) y 2 + z 2
(ix) 2 x 2 + y
(x) 2y 2 − z 3
(xi) y 2 z
(xii) 3y 2 z 2
(iv)
14
2. evaluate when
(i)
(iv)
p = 4,
p 2 + q3 − r 2 + 3 pqr p q r − + r p q
(vii) 3 p 2 + 2q − 2 pq 2 r
(x)
p + 2q
r −q
−
p+r p+q
GCSE Maths Tutor
q = 5 and r = 6 (ii) ( p − q + r )(2q − 4r )
(iii) ( p − r )2 + (q − p)2
p −1 q − r − 3 2
(vi)
(viii) p 2 + 2q3 − 2r 2
(ix)
(v)
r
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p+q
r
p−q 3
−
pq + r p
p2 − q2 p − r 2 (xii) − r r + 2p
3r + 2 p 2q −
pq − r
−
4
2
(xi)
r+ p
[email protected]
ref. alg/substitution/02/2008
Algebra - substitution GCSE Maths Tutor
evaluation of expressions www.gcsemathstutor.com
answer sheet 01 [email protected]
1. (ii)
6
(iii)
3 2
(v)
16
(vi)
1
(vii) 9
(viii) 13
(ix)
4
(x) -19
(xi)
(xii)
108
(i)
(iv)
6 3 7
12
2.
(i) 465
(iv)
37 60
(vii) -1142
(x) 12 89
(ii) -70
(iii) 5
(v) 1 12
(vi)
(viii) 194
(ix) -5
13 21
11 (xii) 3 14
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[email protected]
(xi) 6
GCSE Maths Tutor
2 56
ref. alg/substitution/02/2008
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