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The question from the image appears to be:

**Hasil dari \( 7\sqrt{8} - 9\sqrt{18} - 5\sqrt{2} \) adalah:**

Let's solve it step by step.

### Step 1: Simplify each square root term.
- \( \sqrt{8} = \sqrt{4 \times 2} = 2\sqrt{2} \)
- \( \sqrt{18} = \sqrt{9 \times 2} = 3\sqrt{2} \)
- \( \sqrt{2} \) remains the same.

### Step 2: Substitute these into the original equation.
\[
7\sqrt{8} - 9\sqrt{18} - 5\sqrt{2} = 7(2\sqrt{2}) - 9(3\sqrt{2}) - 5\sqrt{2}
\]
This simplifies to:
\[
14\sqrt{2} - 27\sqrt{2} - 5\sqrt{2}
\]

### Step 3: Combine like terms.
\[
(14 - 27 - 5)\sqrt{2} = -18\sqrt{2}
\]

### Final Answer:
The result is \( -18\sqrt{2} \).

Would you like further details on this solution? Here are some follow-up questions you might consider:

1. How would the solution change if the radicals were different?
2. What is the best way to simplify complex radical expressions?
3. Can you generalize this process for any expression with radicals?
4. Why is it important to simplify radicals before combining them?
5. How do different properties of square roots help in simplifying expressions?

**Tip:** Always factor numbers under the square root to their simplest radical form before combining terms!

Hasil dari 7√8 - 9√18 - 5√2 adalah?

Learn how to simplify and solve the radical expression 7√8 - 9√18 - 5√2. This step-by-step solution covers simplifying square roots and combining like radical terms. Suitable for students in Grades 9-11.

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