Answer:
1. a² + 10a + 25
2. ax² y² - 42xy + 49
3. xy - 2x + y² - 2y
4. 4x² + 9y² + 25 + 12xy + 20x+30y
5. 9a² + b² + 4c² - 6ab + 12ac - 4bc
1. a^2+10a+25
Step-by-step explanation:
1. (a+5)^2
=a^2+2a•5+5^2
=a^2+10a+25
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Answer:
1. a² + 10a + 25
2. ax² y² - 42xy + 49
3. xy - 2x + y² - 2y
4. 4x² + 9y² + 25 + 12xy + 20x+30y
5. 9a² + b² + 4c² - 6ab + 12ac - 4bc
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Answer:
1. a^2+10a+25
Step-by-step explanation:
1. (a+5)^2
=a^2+2a•5+5^2
=a^2+10a+25