if `A = 2hati - 3hatj+7hatk, B = hati + 2hatj and C=hatj - hatk`. Find `A(BxxC)`

Explanation

To solve the problem, we need to find \( A \cdot (B \times C) \) where:

- \( A = 2\hat{i} - 3\hat{j} + 7\hat{k} \)
- \( B = \hat{i} + 2\hat{j} \)
- \( C = \hat{j} - \hat{k} \)

### Step 1: Calculate \( B \times C \)

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