UNIT 4 : ALGEBRA
Practice 4.1
1. Write the coefficient and unknown each of the following algebraic terms.
Terms Coefficient Unknown
(sebutan) (pekali) (pembolehubah)
a) 12p 12 p
b) 焸 2
c) -3 x2
d) 焸 -1 k
1 x
3
2. Determine whether the following pairs of term are like terms or unlike terms.
Terms Like Terms Unlike Terms
(sebutan) (sebutan (sebutan tak
serupa)
serupa)
a) 8p, 8q √
b) 搘 t √
c) 㐴t‵搘 㐴t
d) 搘 焸 √
√
3. Simplify each of the following.
a) x 2x 5x 3y b) 3p 6p 5p p
= 8x - 3y = 3p
b) 8a 2 3a 2 3a 7a c) 15 8xy 7 2xy 3x Unit 4: Algebra
= 11a2 - 10a = 8 - -9xy
1
UNIT 4 : ALGEBRA e) x 5 2x 7
d) mn nm 1 = -x - 2
= 2mn - 1
g) a 2 b 3 x ab h) ( x 3 y 3 )( 4xy 3 )
= a 2+ 1 b 3+1
=a 3b 4 = 4 (x 3 + 1 y 3+3 )
= 4 x 4y 6
i) 3a 4b 2 5ab 7c 6
=15 a 4+1 b 2+7 c6 j) x 3 y 3 X xy 2
=15 a 5 b 9 c6
2
1
= 2 x 3+1 y 3+2
1
=2 x4y5
k) x3y3 xy3 l) 3 x2y3 xy5
x3y3 3 x2y3
xy3 xy5
x2 3xy 2or 3x
y2
m) 2a2b5c 6 (4a5 b3c 6 ) n) 10 x3 y 4 z2
2x5 yz7
2a2b5c 6
4a5b3c6 10x3y4z2
2x5yz7
1b2 1 a3b2 Unit 4: Algebra
2a3 2
or
5y3 or 5x2y3z5
x2z5
2