Question

Помогите пожалуйста!! ​

Answer 1

Решение:

1

x²y + y * x * y = x²y + y²x = xy(x + y)

2a * a² * 3b + a * 8c = 6a³b + 8ac

1,9x³ - 2,9x³ - x³ =  -x³ - x³ = -2x³

20xy + 5xy - 17xy = 8xy

8ab² - 3ab² + ab² - 7ab² = -ab²

2

(3a² + 7a - 5) - (3a² + 1) = 3a² + 7a - 5 - 3a² - 1 = 7a - 6

(5a + 3) + (-2a² + a + 7)  = 5a + 3 - 2a² + a + 7 = 6a + 10 - 2a²

x² - 3xy + y² - (x² - y²) = x² - 3xy + y² - x² + y² = 2y² - 3xy

(x + 6y) + (3 - 6y) = x + 6y + 3 - 6y = x + 3

(a - b + c) + (a - c) - (a - b - c) = a - b + c + a - c - a + b + c = a + c

3

3(x + 1) + (x - 1) = 3x + 3 + x - 1 = 4x + 2

3x(x - 2) - 5x(x + 3) = 3x² - 6x - 5x² - 15x = -2x² - 21x

13(6b - 1) - 6(13b - 1) = 78b - 13 - 78b + 6 = -7

p(p² - 2a) + a(2p - a²) = p³ - 2ap + 2ap - a³ = p³ - a³