Answer:
1. 3(x² + 7) = 3x² + 21
2. 2s(s - 4) = 2s² - 8s
3. (w + 7)(w + 3) = w² + 10w + 21
4. (x - 9)(x - 2) = x² - 11x + 18
5. (2t - 1)(t + 5) = 2t² + 9t -5
6. (x + 4)(x + 4) = x² + 8x +16
7. (2r - 5)(2r - 5) = 4r² - 20r + 25
8. (3 - 4m)² = 9 - 24m + 16m²
9. (2h - 7)(2h + 7) = 2h² - 49
10. (8 - 3x)(8 + 3x) = 64 - 9x²
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Answers & Comments
Answer:
1. 3(x² + 7) = 3x² + 21
2. 2s(s - 4) = 2s² - 8s
3. (w + 7)(w + 3) = w² + 10w + 21
4. (x - 9)(x - 2) = x² - 11x + 18
5. (2t - 1)(t + 5) = 2t² + 9t -5
6. (x + 4)(x + 4) = x² + 8x +16
7. (2r - 5)(2r - 5) = 4r² - 20r + 25
8. (3 - 4m)² = 9 - 24m + 16m²
9. (2h - 7)(2h + 7) = 2h² - 49
10. (8 - 3x)(8 + 3x) = 64 - 9x²