
persamaan kuadrat

Quiz
•
Mathematics
•
9th - 12th Grade
•
Hard
Soalquiziz Soalquiziz
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
11. Persamaan kuadrat x2 – 5x + 6 = 0 mempunyai akar – akar x1 dan x2. Persamaan kuadrat yang akar – akarnya x1 – 3 dan x2 – 3 adalah
x2 – 2x = 0
x2 – 2x + 30 = 0
x2 + x = 0
x2 + x – 30 = 0
x2 + x + 30 = 0
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
12. Pak dedi mempunyai kebun berbentuk persegi panjang dengan luas 192 m2. Selisih panjang dan lebarnya adalah 4 m. Apabila disekeliling kebun dibuat jalan dengan lebar 2 m, maka luas jalan tersebut adalah … m2.
96
128
144
156
168
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
13. Persamaan 2x2 + qx + (q – 1) = 0 mempunyai akar – akar x1 dan x2. Jika x12 + x22 = 4, maka nilai q =
-6 dan 2
-6 dan -2
-4 dan 4
-3 dan 5
-2 dan 6
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
14. Jika nilai diskriminan persamaan kuadrat 2x2 – 9x + c = 0 adalah 121, maka c =
-8
-5
2
5
8
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
15. Persamaan (1 – m)x2 + (8 – 2m)x + 12 = 0 mempunyai akar kembar, maka nilai m =
-2
-3/2
0
3/2
2
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
17. Grafik fungsi kuadrat f(x) = x² + bx + 4 menyinggung garis y = 3x + 4. Nilai b yang memenuhi adalah
– 4
-3
0
3
4
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
18. Grafik y = px2 + (p + 2)x – p + 4 memotong sumbu x di dua titik. Batas – batas nilai p yang memenuhi adalah…
p < -2 atau p > – 2/5
p < 2/5 atau p > 2
p < 2 atau p > 10
2/5 < p < 2
2 < p < 10
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