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21. Which of the following can be factored?
A) x² - 4
B) x2 + 4
C) 2x + 3
D) x2 + x + 1
21. Which of the following can be factored?
A) x² - 4
B) x2 + 4
C) 2x + 3
D) x2 + x + 1
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Answer:
I think the answer is A.
It can be factored to (x+2)(x-2).
Answer:
A. x²-4
Step-by-step explanation:
Kasi (x-2)(x+2) Ang answer and Hindi b Kasi x2+4 cannot be factored using real number coefficient. Depending on your class, that may be enough of an answer. If you really need to factor completely and are allowed to use complex numbers, you can. You can check this answer by multiplying.
(pero d ko pa dn sure)