Answer:
C. 4x²
Explanation:
8x^4 = 2 × 2 × 2 × x × x × x × x
12x³ = 2 × 2 × 3 × x × x × x
20x² = 2 × 2 × x × x
Look at the factors. Which factors do both numbers have?
They are in bold below.
8x^4 = 2 × 2 × 2 × x × x × x × x
12x³ = 2 × 2 × 3 × x × x × x
20x² = 2 × 2 × 5 × x × x
The common factors are 2, 2, x, x.
The GCF = 2 × 2 × x × x = 4x²
Answer: C. 4x²