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Sagot :
Let's simplify each radical expression step-by-step and determine if any further simplification is possible for the given expressions.
### 1. Simplifying [tex]\( 3 \sqrt{7} - 5 \sqrt[4]{7} \)[/tex]:
First, we note that [tex]\( \sqrt{7} \)[/tex] and [tex]\( \sqrt[4]{7} \)[/tex] are different types of roots and do not share a common radical form. Therefore, they cannot be combined through addition or subtraction.
The expression [tex]\( 3 \sqrt{7} - 5 \sqrt[4]{7} \)[/tex] remains as it is because:
- [tex]\( 3 \sqrt{7} \)[/tex] is already in its simplest form.
- [tex]\( 5 \sqrt[4]{7} \)[/tex] is also in its simplest form.
Thus, [tex]\( 3 \sqrt{7} - 5 \sqrt[4]{7} \)[/tex] cannot be simplified further.
### 2. Simplifying [tex]\( -2 \sqrt{7} \)[/tex]:
This expression is already in its simplest form. There are no further simplifications that can be made.
Thus, [tex]\( -2 \sqrt{7} \)[/tex] cannot be simplified further.
### 3. Simplifying [tex]\( -2 \sqrt[3]{7} \)[/tex]:
Similar to the previous expression, [tex]\( -2 \sqrt[3]{7} \)[/tex] is also in its simplest form. There are no further simplifications that can be made.
Thus, [tex]\( -2 \sqrt[3]{7} \)[/tex] cannot be simplified further.
### 4. Evaluating if any of the given expressions can be simplified:
All the given expressions are in their simplest forms, and no further simplification is possible. Therefore, the statement "cannot be simplified" applies to all.
### Summary:
- [tex]\( 3 \sqrt{7} - 5 \sqrt[4]{7} \)[/tex] cannot be simplified further: it remains as [tex]\( -5 \cdot 7^{1/4} + 3 \cdot \sqrt{7} \)[/tex].
- [tex]\( -2 \sqrt{7} \)[/tex] is already simplified.
- [tex]\( -2 \sqrt[3]{7} \)[/tex] is already simplified.
Hence, none of the expressions can be simplified further.
### 1. Simplifying [tex]\( 3 \sqrt{7} - 5 \sqrt[4]{7} \)[/tex]:
First, we note that [tex]\( \sqrt{7} \)[/tex] and [tex]\( \sqrt[4]{7} \)[/tex] are different types of roots and do not share a common radical form. Therefore, they cannot be combined through addition or subtraction.
The expression [tex]\( 3 \sqrt{7} - 5 \sqrt[4]{7} \)[/tex] remains as it is because:
- [tex]\( 3 \sqrt{7} \)[/tex] is already in its simplest form.
- [tex]\( 5 \sqrt[4]{7} \)[/tex] is also in its simplest form.
Thus, [tex]\( 3 \sqrt{7} - 5 \sqrt[4]{7} \)[/tex] cannot be simplified further.
### 2. Simplifying [tex]\( -2 \sqrt{7} \)[/tex]:
This expression is already in its simplest form. There are no further simplifications that can be made.
Thus, [tex]\( -2 \sqrt{7} \)[/tex] cannot be simplified further.
### 3. Simplifying [tex]\( -2 \sqrt[3]{7} \)[/tex]:
Similar to the previous expression, [tex]\( -2 \sqrt[3]{7} \)[/tex] is also in its simplest form. There are no further simplifications that can be made.
Thus, [tex]\( -2 \sqrt[3]{7} \)[/tex] cannot be simplified further.
### 4. Evaluating if any of the given expressions can be simplified:
All the given expressions are in their simplest forms, and no further simplification is possible. Therefore, the statement "cannot be simplified" applies to all.
### Summary:
- [tex]\( 3 \sqrt{7} - 5 \sqrt[4]{7} \)[/tex] cannot be simplified further: it remains as [tex]\( -5 \cdot 7^{1/4} + 3 \cdot \sqrt{7} \)[/tex].
- [tex]\( -2 \sqrt{7} \)[/tex] is already simplified.
- [tex]\( -2 \sqrt[3]{7} \)[/tex] is already simplified.
Hence, none of the expressions can be simplified further.
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