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Question
Subtract: 5a2 - 7ab + 5b2 from 3ab - 2a2 -2b2
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Solution
(3ab - 2a2 - 2b2) - (5a2 - 7ab + 5b2)
= 3ab - 2a2 - 2b2 - 5a2 + 7ab - 5 b2
= 3ab + 7ab - 2a2 - 5a2 − 2b2 - 5 b2
= 10ab - 7a2 - 7b2
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At age of 2 years, a cat or a dog is considered 24 “human” years old. Each year, after age 2 is equivalent to 4 “human” years. Fill in the expression [24 + 
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| Age | [24 +  (a – 2)] |
Age (Human Years) |
| 2 | ||
| 3 | ||
| 4 | ||
| 5 | ||
| 6 |
