Question

Сделайте всё пжпж дам 40 баллов ​

Answer 1

1.

1,5×6²-2³ = 1,5×36-8 = 54-8 = 46

2.

a) x^6×x² = x^8

b) x^8/x² = x^6

в) (x^8)² = x^16

г)

$\frac{ {( {x}^{4}) }^{5} \times {x}^{2} }{ {x}^{12} } = \frac{ {x}^{22} }{ {x}^{12} } = {x}^{10}$

3.

1.

$- 3 {a}^{2} {b}^{4} \times 3 {a}^{2} \times {b}^{5} = - 9 {a}^{4} {b}^{9}$

2.

${( - 4 {a}^{2} {b}^{6}) }^{3} = - 64 {a}^{6} {b}^{18}$

4.

$(5 {x}^{2} + 6x - 3) - (2 {x}^{2} - 3x - 4) = 5 {x}^{2} + 6x - 3 - 2 {x}^{2} + 3x + 4 = 3 {x}^{2} + 9x + 1$

5.

1. $\frac{ {4}^{6} \times {2}^{9} }{ {32}^{4} } = \frac{ {( {2}^{2} })^{6} \times {2}^{9} }{ {( {2}^{5} })^{4} } = \frac{ {2}^{21} }{ {2}^{20} } = 2$
2. ${(2 \frac{2}{3} })^{5} \times {( \frac{3}{8} })^{6} = {( \frac{3}{8} })^{ - 5} \times {( \frac{3}{8} })^{6} = \frac{3}{8} = 0.375$

6.

$125 {a}^{6} {b}^{3} \times {( - 0.2 {a}^{2} {b}^{4} })^{3} = 125 {a}^{6} {b}^{3} \times ( - 0.008 {a}^{6} {b}^{12} ) = - {a}^{12} {b}^{15}$

7.

$(5 {a}^{3} - 2ab + 6b) - ( {a}^{3} + 2ab - 2b) = 4 {a}^{3} + 8b$

8.

$(3n + 16) - (6 - 2n) = 3n + 16 - 6 + 2n = 10 + 5n = 5(2 + n)$

Если один из множителей делится на 5,то целое произведение делится на 5 (кратно 5).

9.

1. $- 6 {a}^{2} {b}^{3} = - 3 \times 2 {a}^{2} {b}^{3} = - 27$
2. $2 {a}^{4} {b}^{6} = 2 {( {a}^{2} {b}^{3} })^{2} = 2 \times {9}^{2} = 162$

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