Asesmen Aljabar Kelas 8
Quiz
•
Mathematics
•
8th Grade
•
Practice Problem
•
Hard
ANDI ANDI
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20 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
1. Hitunglah: 3x + 5x - 2x.
6x
5x
4x
7x
Answer explanation
Untuk menghitung 3x + 5x - 2x, kita jumlahkan koefisiennya: 3 + 5 - 2 = 6. Jadi, hasilnya adalah 6x, yang merupakan pilihan yang benar.
2.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
Sebuah persegi panjang memiliki panjang (x+2) cm dan lebar (2x-1)cm. Keliling persegi panjang tersebut adalah ... cm
(2x-6)
(6x+2)
(2x+6)
(6x-2)
Answer explanation
Keliling persegi panjang dihitung dengan rumus 2(panjang + lebar). Dengan panjang (x+2) dan lebar (2x-1), kelilingnya menjadi 2((x+2) + (2x-1)) = 2(3x + 1) = 6x + 2. Jadi, jawaban yang benar adalah (6x+2).
3.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
3. Sederhanakan: (2x + 4) / 2.
x + 1
x + 2
x + 4
2x + 2
Answer explanation
Untuk menyederhanakan (2x + 4) / 2, bagi setiap suku dengan 2: (2x/2) + (4/2) = x + 2. Jadi, jawaban yang benar adalah x + 2.
4.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
4. Hitunglah: 4a - 3b + 2a + b.
6a - 2b
5a - 4b
4a + 3b
2a - b
Answer explanation
Gabungkan suku-suku sejenis: 4a + 2a = 6a dan -3b + b = -2b. Jadi, hasilnya adalah 6a - 2b, yang merupakan pilihan yang benar.
5.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
5. Faktorkan: 2x^2 + 8x.
4x(x + 2)
2(x^2 + 4x)
2x(x + 4)
x(2x + 8)
Answer explanation
To factor 2x^2 + 8x, first factor out the common term 2x. This gives 2x(x + 4), which matches the correct answer. The other options do not simplify to the original expression.
6.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
6. Sederhanakan: (3x^2 + 6x) / 3x.
2x + 3
x + 2
3x + 6
x^2 + 2x
Answer explanation
Untuk menyederhanakan (3x^2 + 6x) / 3x, bagi setiap suku dengan 3x. Hasilnya adalah x + 2, yang merupakan pilihan yang benar.
7.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
7. Hitunglah: 5(x + 2) - 3(x - 1).
3x + 10
2x + 13
5x + 7
2x + 5
Answer explanation
Pertama, distribusikan: 5(x + 2) = 5x + 10 dan -3(x - 1) = -3x + 3. Gabungkan hasilnya: 5x + 10 - 3x + 3 = 2x + 13. Jadi, jawaban yang benar adalah 2x + 13.
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