1.6. Есептеңдер: 1) (4/5)^2; 2) (−2/3)^2; 3) (1 1/2)^2; 4) (−2 1/4)^2.

1. \(\left(\frac45\right)^2=\frac{16}{25}\).
2. \(\left(-\frac23\right)^2=\frac49\).
3. \(1\frac12=\frac32\), сондықтан \(\left(1\frac12\right)^2=\frac94=2\frac14\).
4. \(-2\frac14=-\frac94\), сондықтан \(\left(-2\frac14\right)^2=\frac{81}{16}=5\frac1{16}\).

Жауап: 1) 16/25; 2) 4/9; 3) 2 1/4; 4) 5 1/16.