Question

помогите плизззззз ​

Answer 1

1.

$frac{3p - 3}{4} = frac{3 times 5- 3}{4} = frac{15 - 3}{4} = frac{12}{4} = 3$

2.

$frac{ - 56x {y}^{3} }{72 {x}^{2} {y}^{2} } = frac{ - 7y}{9x} = - frac{7y}{9x}$

3.

$frac{3x + 7}{2} - frac{4x + 7}{6} = frac{3 times (3x + 7) - (4x + 7)}{6} = frac{9 + 21 - 4x - 7}{6} = frac{5x + 14}{6}$

4.

$frac{ {m}^{2} }{21p} times frac{7p}{m {n}^{2} } = frac{m}{3} times frac{1}{ {n}^{2} } = frac{m}{3 {n}^{2} }$

5.

$sqrt{0.25 times 64} = sqrt{16} = 4$

6.

${x}^{2} - 7 = 16 \ {x}^{2} = 16 + 7 \ {x}^{2} = 23 \ times = + - sqrt{23}$

7.

$sqrt{3} \ 0.7 \ sqrt{0.25}$

9.

$6 {x}^{2} + 4x - 2 = 0 \ d = {4}^{2} - 4 times 6 times ( - 2) = 16 + 48 = 64 = {8}^{2} \ x1 = frac{ - 4 + 8}{2 times 6} = frac{2}{12} = frac{1}{6} \ x2 = frac{ - 4 - 8}{2 times 6} = frac{ - 12}{12} = - 1$

Ответ: 1/6