Question

помогите пожалуйста дам 20 баллов​

Answer 1

1)

$0.04x {}^{2} - 1.2xy + 9y {}^{2} = ( \frac{1}{5} x - 3y) {}^{2}$

3)

$1.96k {}^{2} - 14kt + 25t {}^{2} = ( \frac{7}{5} k - 5t) {}^{2}$

5)

$\frac{1}{4} x {}^{2} - \frac{3}{8} xy + \frac{9}{64} y \frac{}{} {}^{2} = \frac{1}{64} \times (4x - 3y) {}^{2}$

2)

$36c {}^{2} + 6cd + 0.25d {}^{2} = (6c + \frac{1}{2} d) {}^{2}$

4)

$\frac{1}{49} a {}^{2} + \frac{2}{21} ab + \frac{1}{9} b {}^{2} = \frac{1}{441} \times (3a + 7b) {}^{2}$

6)

$81d {}^{2} - \frac{27}{2} cd + \frac{9}{16} c {}^{2} = (9d - \frac{3}{4c} ) {}^{2}$

Удачи