
LATSO ASAT MATEMATIKA 8
Authored by ira diana
Mathematics
8th Grade
Used 6+ times

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40 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
Sederhanakan bentuk aljabar berikut: 3x + 5x - 2x = ...
10x
6x
8x
3x
Answer explanation
Untuk menyederhanakan 3x + 5x - 2x, kita jumlahkan koefisiennya: 3 + 5 - 2 = 6. Jadi, hasilnya adalah 6x.
2.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
Jika a=2 dan b=3, nilai dari 2a^2 - 3b adalah...
-1
2
3
-4
Answer explanation
Diberikan a=2 dan b=3, kita substitusi ke dalam rumus: 2a^2 - 3b = 2(2^2) - 3(3) = 2(4) - 9 = 8 - 9 = -1. Jadi, nilai dari 2a^2 - 3b adalah -1.
3.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
Hasil kali dari (x + 3)(x - 2) adalah...
x^2 + x - 6
x^2 + x + 6
x^2 - x - 6
x^2 - x + 6
Answer explanation
Untuk menghitung hasil kali (x + 3)(x - 2), gunakan distribusi: x^2 - 2x + 3x - 6. Gabungkan suku sejenis untuk mendapatkan x^2 + x - 6. Jadi, jawaban yang benar adalah x^2 + x - 6.
4.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
Jika 4x - 7 = 9, maka nilai x adalah...
2
3
4
5
Answer explanation
Untuk mencari nilai x, kita tambahkan 7 ke kedua sisi: 4x = 16. Kemudian, bagi kedua sisi dengan 4: x = 4. Jadi, nilai x adalah 4.
5.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
Sederhanakan bentuk: 2(x + 3) - 4(x - 1)
-2x + 14
-2x + 10
6x - 4
2x + 10
Answer explanation
Untuk menyederhanakan, kalikan 2 dengan (x + 3) dan -4 dengan (x - 1): 2x + 6 - 4x + 4. Gabungkan: 2x - 4x + 6 + 4 = -2x + 10. Jadi, jawaban yang benar adalah -2x + 10.
6.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
Jika x = 3, nilai dari 5x - 2(x + 4) adalah...
1
7
11
15
Answer explanation
Substitusi x = 3 ke dalam 5x - 2(x + 4): 5(3) - 2(3 + 4) = 15 - 2(7) = 15 - 14 = 1. Jadi, nilai dari 5x - 2(x + 4) adalah 1.
7.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
Jika 2x + y = 7 dan x - y = -1, nilai x dan y adalah...
x=2, y=3
x=3, y=1
x=1, y=5
x=4, y=-1
Answer explanation
Untuk menyelesaikan sistem persamaan, substitusi atau eliminasi dapat digunakan. Dari persamaan pertama, kita dapatkan y = 7 - 2x. Substitusi ke persamaan kedua menghasilkan x = 2 dan y = 3, yang merupakan solusi yang benar.
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