Question

Помогиииитееее срочно нада

Answer 1

Ответ:

Объяснение:

1) -3х(х - 2) + 7 (х^2 + 2x) = -3x^2 + 6x + 7x^2 + 14x = 4x^2 + 20x = x^2 + 5x = x(x + 5)

2) 4a (2a - 3b) - 6b(5b - 2a) = 8a^2 - 12ab - 30b^2 + 12 ab = 8a^2 - 30b^2 = 2(4a^2 - 15b^2)

1) 7x - 3(x + 1) = 13

7x - 3x -3 - 13 = 0

4x = 16

x = 4

2) 4x - (2x-1)/3 = 6

12x - 2x-1 = 18

10x = 19

x = 1,9

1) 7ay + 6a = a(7y +6)

2) 15y^2 - 5y = 5y(3y - 1)