The square of (- 3) / (- 2 and 1 / 4 × 4 / 9) Don't write the answer directly

The square of (- 3) / (- 2 and 1 / 4 × 4 / 9) Don't write the answer directly

The square of (- 3) / (- 2 and 1 / 4 × 4 / 9)
=9÷(-9/4×4/9)
=9÷(-1)
=-9