Question

алгебра 7 класс все кроме 9 и 6​

Answer 1

1.

$- \frac{5}{2} \times {( - 4)}^{2} = - \frac{5}{2} \times 16 = - 5 \times 8 = - 40 \\$

ответ: - 40

2.

${( - \frac{3x}{5}) }^{5} \div {( - \frac{3x}{5}) }^{2} = ( - \frac{3x}{5}) ^{5 - 2} = {( - \frac{3x}{5}) }^{3} \\$

3.

$\frac{225 \times 6}{ {5}^{2} \times {3}^{3} } = \frac{ 225 \times 2 }{25 \times 3} \\ = \frac{9 \times 2}{3} = 3 \times 2 = 6$

ответ: 6

4.

$x \div {5}^{2} = 5 \\ x = {5}^{2} \times 5 \\ x = 125$

ответ: 125

5.

$\frac{ {( {m}^{3} )}^{2} \times {m}^{4} }{ {m}^{7} } = \frac{ {m}^{6} \times {m}^{4} }{ {m}^{7} } = {m}^{6 + 4 - 7} = {m}^{3} \\$

7.

${( - 2 {a}^{5} b}^{4} ) ^{5} = 32 {a}^{25} {b}^{20} \\$

8.

$169 {x}^{4} {y}^{8} = {(13 {x}^{2} {y}^{4} )}^{2}$