Упростить выражение:1)y(y-5)(y+5)-(y+2)(y^2-2y+4)разложите на

 y(y - 5)(y + 5) - (y + 2)(y - 2y + 4)= y(y - 25) - (y + 2) = y - 25y - y - 8 =
= 8-25y

a - 36 b + a - 6b = (a - 36b) + (a - 6b) = (a - 6b)(a + 6b) + (a - 6b) =
= (a - 6b)(a + 6b + 1)

4 - m + 14mn - 49n = 4 - (m - 14mn + 49n) = 2 - (m - 7n) =
= (2 - m + 7n)(2 + m - 7n)

2x - 32x = 0
2x(x - 16) = 0
x(x - 4)(x + 4) = 0
либо  x = 0       или  x - 4 = 0             либо    x + 4 = 0
                                x = 4                           x = - 4

81x + 18x + x = 0
x(81x + 18x + 1) = 0
x(9x + 1) = 0
либо  x = 0            либо   9x + 1 = 0
                                       9x = - 1
                                       x = - 1/9

x + 6x - x - 6 = 0
(x - x) + (6x - 6) = 0
x(x - 1) + 6(x - 1) = 0
(x - 1)(x + 6) = 0
(x - 1)(x + 1)(x + 6) = 0
либо x - 1 = 0              или  x + 1 = 0            или  x + 6 = 0
       x = 1                          x = - 1                       x = - 6