Page 17 - Praktis Strategi 2020 Matematik - Tingkatan 2

Matematik Tingkatan 2 Bab 2 Pemfaktoran dan Pecahan Algebra

(c) Permudahkan: (b) Sebuah segi empat sama digunting daripada
Simplify: sekeping kertas berukuran 21 cm lebar dan
29.7 cm panjang. Lebihan panjang kertas yang
2
y – 4 3y + 6
÷ digunting ialah r. Hitung luas segi empat sama
4st 12s
yang digunting. [3 markah]
[4 markah / 4 marks] A square was cut off from a paper with measurement
of 21 cm width and 29.7 cm length. The remaining
length of the paper is r. Calculate the area of the cut
Tukarkan operasi bahagi kepada operasi darab. off square. [3 marks]
Kemudian, lakukan pemfaktoran dan permudahkan
sebutan dan ungkapan yang serupa. Jawapan / Answer:
Change the division operation to multiplication operation.
Then, factorise and simplify the like terms and expression. Panjang = Lebar = 29.7 – r

Luas = (29.7 – r)(29.7 – r)
Jawapan / Answer: 2
= 882.09 – 29.7r – 29.7r + r
2
y – 4 3y + 6 = (r – 59.4r + 882.09) cm 2
2
÷
4st 12s
y – 4 12s
2
= ×
4st 3y + 6 (c) Permudahkan:
y – 2 2 12s Simplify:
2
= ×
4st 3(y + 2) (b – 2) – (9b + 12b – 5) ÷ (3b – 1)
2
2
3 1
(y + 2)(y – 2) 12s [4 markah / 4 marks]
= ×
4st 3(y + 2)
1 1 Jawapan / Answer:
y – 2 2 2
= (b – 2) – (9b + 12b – 5) ÷ (3b – 1)
t 2
= (b – 2) – (9b + 12b – 5)
2
(3b – 1)
2. (a) Kembangkan
Expand = (b – 2) – (3b – 1)(3b + 5)
2
(i) 6h(1 − h) (3b – 1)
(ii) 2p(q − 3) 2
= b – 4b + 4 – (3b + 5)
(iii) 2p(q − 3)
[3 markah / 3 marks]
2
= b – 7b – 1
Jawapan / Answer:
(i) 6h(1 – h)
= 6h – 6h 2
(ii) 2p(q – 3)
= 2pq – 6p
(iii) –5(4 – 9m)
= –20 + 45m

25 © Penerbitan Pelangi Sdn. Bhd.

02 Bab 2.indd 25 11/12/19 12:28 PM