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12x² + 9x² = A. 21x²² B. 21x C. 22x² D. 22xA

12x² + 9x² = A. 21x²² B. 21x C. 22x² D. 22xA
asked 114k views
15 votes
12x² + 9x² =
A. 21x²²
B. 21x
C. 22x²
D. 22xA

asked
User Maisie
by
9.1k points

2 Answers

6 votes

Answer: A (if it's just a typo) or
21x^(2)

Explanation:

Since it's the same variable and same exponent, you just need to add the whole numbers and put the same variable and exponent.

12 + 9 = 21


21x^(2)

answered
User Alex Char
by
7.9k points
12 votes

Answer:

21x²

Explanation:

hopefully A is a typo

answered
User Billerby
by
8.5k points
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