
9UK2
Authored by Darwin Manik
Mathematics
9th Grade
Used 3+ times

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20 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Jika p dan q adalah akar-akar persamaan x2 − 5x − 1 = 0, tentukan persamaan kuadrat baru yang akar-akarnya
2p + 1 dan 2q + 1.
x² + 12 x - 7 = 0
x² + 12 x + 7 = 0
x² - 12 x + 7 = 0
x² - 12 x - 7 = 0
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui akar-akar persamaan kuadrat 2x2 – 4x + 1 = 0 adalah m dan n. Tentukan
persamaan kuadrat baru yang akar-akarnya m + n dan m.n.
2x² - 5x - 2 = 0
2x² + 5x + 2 = 0
2x² + 5x - 2 = 0
2x² - 5x + 2 = 0
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Persamaan 2x2 + qx + (q – 1) = 0 mempunyai akar-akar x1 dan x2. Jika x12 + x22 = 4, tentukan nilai q!
6
-6
2
4
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Persamaan(1 – m)x2 + (8 – 2m)x + 12 = 0 mempunyai akar kembar. Berapa m?
3
2
-2
-3
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Jika nilai diskriminan persamaan kuadrat 2x2 – 9x + c = 0 adalah 121, tentukan nilai c.
5
4
-4
-5
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Jumlah dua bilangan cacah adalah 12. Jika hasil kali dua bilangan itu 35, tentukan kedua bilangan cacah yang dimaksud.
2 dan 10
3 dan 9
4 dan 8
5 dan 7
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Persamaan kuadrat x2 −2x + 7 = 0 mempunyai akar-akar x1 dan x2. Persamaan kuadrat yang akar-akarnya x1 − 2 dan
x2 – 2 adalah ....
x² - 2x + 7
x² + 2x - 7
x² + 2x + 7
x² - 2x - 7
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