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Look at and . Name the two conditions that make these like radicals, then find their sum.
Case context: Like radicals combine the same way like terms combine.
Question: Look at and . Name the two conditions that make these like radicals, then find their sum.
Sample answer: The two conditions are: (1) same index (both are 4th roots), and (2) same radicand (both are ). Since they are like radicals, add the coefficients and keep the radical part unchanged: .
Key points:
- Like radicals must have the same index
- Like radicals must have the same radicand
- Add or subtract only the coefficients
- The radical part does not change
Rubric: Full credit requires stating both conditions (same index, same radicand) and correctly showing that only the coefficients are added while the radical part stays the same, with the correct sum .
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True or False:
Look at and . Name the two conditions that make these like radicals, then find their sum.