TOÁN 9 | PHƯƠNG TRÌNH | CN 15/6/2025
Authored by Vinh Sư Phụ
Mathematics
9th Grade
Used 2+ times
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10 questions
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1.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
Answer explanation
(x-1)(x-2)=0
x-1=0 -> x = 1
x-2=0 -> x=2
2.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
Answer explanation
(x-1)(x-2) +(x-1)(x+3)=0
(x-1)(x-2+x+3)=0
(x-1)(2x+1)=0
x=1 hoặc x = -1/2
3.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
Answer explanation
Bài mẫu gợi ý:
x^2-4x+3=0
x^2-3x-x+3=0
x(x-3)-(x-3)=0
(x-3)(x-1)=0
x=3 hoặc x=1
4.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
Answer explanation
bài mẫu:
1/x + 1/(9 - x) = 1/2
ĐK: x ≠ 0 và 9 - x ≠ 0 => x ≠ 9
2(9 - x) + 2x = x(9 - x)
18 - 2x + 2x = 9x - x²
18 = 9x - x²x² - 9x + 18 = 0
(x - 3)(x - 6) = 0
x - 3 = 0 => x = 3 (TM)
x - 6 = 0 => x = 6 (TM)
5.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
6.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
Answer explanation
|x-1|=5
TH1: x-1=5 => x=6
TH2: x-1=-5 => x=-4
7.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
Answer explanation
|3x-1|=|-2x-3|
TH1: 3x-1=-2x-3 => 5x=-2 => x=-2/5
TH2: 3x-1=2x+3 => x=4
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