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The worksheet contains two parts, (a) and (b), related to the exponential expression:

\[
\left(-\frac{2}{3}\right)\left(-\frac{2}{3}\right)
\]

Let's address each question:

### Part (a)
**Determine whether the value of the expression is positive or negative.**

1. We have two factors: \(-\frac{2}{3}\) and \(-\frac{2}{3}\).
2. When two negative numbers are multiplied, the result is positive.
3. Thus, the value of the expression is **positive**.

### Part (b)
**Write at least one equivalent expression.**

The expression \(\left(-\frac{2}{3}\right) \left(-\frac{2}{3}\right)\) can be simplified as follows:

1. Multiply the two fractions directly:
   \[
   \left(-\frac{2}{3}\right) \times \left(-\frac{2}{3}\right) = \frac{4}{9}
   \]
   
So, an equivalent expression is simply **\(\frac{4}{9}\)**.

Would you like more details or have any questions?

### Related Questions
1. What happens if the expression includes an odd number of negative factors?
2. How can we simplify expressions with multiple fractions?
3. Why does the product of two negative numbers result in a positive outcome?
4. What if the fractions involved were improper fractions?
5. Can we express \(\frac{4}{9}\) in decimal form as an equivalent expression?

### Tip
When multiplying fractions, remember that the product of two negative values is positive, which can help simplify similar problems quickly.

Determine whether the value of the expression (-2/3)(-2/3) is positive or negative and write at least one equivalent expression.

This problem explores whether the expression (-2/3)(-2/3) is positive or negative and provides an equivalent expression. It covers multiplication of fractions, exponents with negative values, and the rule that multiplying two negative numbers yields a positive result. Suitable for Grade 7 students.

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