Question

Помогите пожалуйста
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Answer 1

1. (так)

$5b -(10b - 9) = 9 - 5b \\ 5b - 10b + 9 = 9 - 5b \\ - 5b + 9 = 9 - 5b$

2. Б) -64

$( - 4.1 + 0.1) {}^{3} = { ( - 4)}^{3} = - 64$

3. Г)

$( { - a}^{6} ) {}^{3} \times ( { - a }^{7}) {}^{2} = { -a}^{18} \times a {}^{14} = - a {}^{32}$

4. А)

${(0.2c {}^{4}) }^{2} = 0.04 {c}^{8}$

5. В)

6. Б)

$0.5c {}^{3} b \times 2cb {}^{2} = c {}^{4} b {}^{3}$

7.

$4x {}^{2} - 2xy + 10x {}^{2} + 5xy - 3y {}^{2} = 14x {}^{2} + 3xy - 3y {}^{2}$

8.

$x {}^{2} - 2x - 2 + x - 2x {}^{2} - 4 = - x {}^{2} - x - 6$

$x {}^{2} - 2x - 2 - x + 2x {}^{2} + 4 = 3x {}^{2} - 3x + 2$