4.9 SPM Practis (Soalan Pendek)
Soalan 1:
(1462)+3(204−3)−(−30−2−5)=Penyelesaian:
(1462)+3(204−3)−(−30−2−5)=(1462)+(6012−9)−(−30−2−5)=(7418−7)−(−30−2−5)=(7−(−3)4−018−(−2)−7−(−5))=(10420−2)Soalan 2:
Cari nilai mdalam persamaan matriks berikut:
(9−450)+12(8m6−10)=(13−7−21)
Penyelesaian:
(9−450)+12(8m6−10)=(13−7−21)−4+12m=−712m=−3m=−6Soalan 3:
Diberi(2x3y)−4(−23)=(−26)Cari nilai x dan y.Penyelesaian:
2x + 8 = –2
2x = –10
x= –5
3y – 12 = 6
3y = 18
y= 6
Soalan 4:
Diberi bahawa persamaan matriks 3(6 m) + n(3 4) = (12 7),
Cari nilai m+ n.
Penyelesaian:
3(6 m) + n(3 4) = (12 7)
18 + 3n = 12
3n = –6
n= –2
3m + 4n = 7
3m + 4(–2) = 7
3m = 15
m= 5
Maka m + n = 5 + (–2) = 3