Answer: 3x²(x - 5)²
Explanation:
Factoring out 3x² of each term leaves you with 3x²(x² - 10x +25)
We can still factor out (x² - 10x +25) to (x-5)(x-5), which is simply (x-5)².
This will leave you with 3x²(x - 5)².
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