2 years ago

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

Mathematics

2 answers:

mel-nik [20]2 years ago

6 0

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

Step-by-step 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

$21x^{2}$

Gnesinka [82]2 years ago

3 0

Answer:

21x²

Step-by-step explanation:

hopefully A is a typo

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