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Answer:
1. C
2. WALANG SAGOT ( iyong B baka -xy)
(5x + y)(4x - y)
20x² - 5xy + 4xy - y²
20x² - xy - y²
3. D
(x + 4z)(x + 4z)
x² + 4xz + 4xz + 16z²
x² + 8xz + 16z²
4. B
(2x - 3)(2x - 3)
4x² - 6x - 6x + 9
4x² - 12x + 9
5. C
(x + 10)(x - 10)
x² - 10x + 10x - 100
x² - 100
6. B
(3a + 5b)(3a - 5b)
9a² - 15ab + 15ab - 25b²
9a² - 25b²
7. B
(m-n)(m-n)(m-n)
(m² - mn - mn + n²)(m - n)
m³ − 3m²n + 3mn² − n³
8. D
b³ − 30b² + 300b − 1000
9. C
a³ + 8
10. D
a² + 2ab + 2ac + b² + 2bc + c²
a² + b² + c² + 2ab + 2ac + 2bc
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