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Answer:
1. 3x² + 21
2. 2s² - 8s
3. w² + 10w + 21
Explanation:
1)
3(x² + 7)
= 3x² + 21
2)
2s (s - 4)
= 2s² - 8s
3)
(w + 7)(w + 3)
= w² + 3w + 7w + 21
= w² + 10w + 21
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