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數學
高中一至三年級
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已顯示全部 5 道題目——免費註冊即可匯入這個題庫，和全班一起玩。
1
Which of the following is the complete factored form of x² - 9?
A
(x - 9)(x + 1)
B
(x - 3)(x + 3)
C
(x - 3)²
D
(x + 3)²
2
Factor completely: 2x² + 8x + 6.
A
2(x + 2)(x + 3)
B
2(x + 1)(x + 3)
C
2(x + 1)(x + 6)
D
(2x + 2)(x + 3)
3
Simplify the rational expression (x² - 4) / (x² - x - 6), stating any restrictions on the variable.
A
(x - 2)/(x + 3), x ≠ -3, 2
B
(x + 2)/(x + 3), x ≠ -3, 2
C
(x - 2)/(x - 3), x ≠ -2, 3
D
(x + 2)/(x - 3), x ≠ -2, 3
4
For what value(s) of x is the rational expression (x + 1)/(x² - 4) undefined?
A
x = 0
B
x = -1
C
x = 2 and x = -2
D
x = 4
5
Which of the following is the correct simplification of (x² - 1)/(x² + 2x + 1)?
A
(x - 1)/(x + 1), x ≠ 1
B
(x + 1)/(x - 1), x ≠ -1
C
(x - 1)/(x + 1), x ≠ -1
D
(x + 1)/(x - 1), x ≠ 1