(x + 3)(x - 3) + (4 - x)x - 3x;
x(1 - 2x) - (x - 3)(x + 3) + 3x2;
x2(3 - x) - (2 - x2)(x + 1) - 4x2;
(x + 2)(x + 2) - x(5 - x) - 2x2.
MN-PQ при M = a - 3, N = a2 - 8a + 5, P = a - 8, Q = a2 - 3a + 5;
AB-CD при A = x2 - 3x + 2, B = 2x + 5, C = 2x2 + 7x +17, D = x - 4.
(x - 5)(x - 3) - (x + 1)(x + 2) при x = -2
10
11
;
(a + 6)(a - 2) - (a - 7)(a + 1) при a = 0,51;
(a2 - ab + 2b2)(a - b) - (a2 +2ab - b2)(a +2b)
при a = -1
1
2
, b = -1
1
2
;
(a2 + 4ax + x2)(a - 2x) -
(a2 - 5ax - 2x2)(a + x) при a = -1
1
2
, x = 0,27.
(2a - 5b)(... - ...) = 6a3 - 15a2b - 14ab + ...;
(... - ...)(6x2 - 5y2) = 12x3 + 42x2y - ... - 35y3;
(... - ...)(... - ...) = 24c4 - 18a3 - 4ab3 + ...;
36y5 - 54y4 + 10y - ... = (... - ...)(... + ...).
12x2 - (4x - 3)(3x + 1) = -2;
(x + 1)(x + 2) - (x + 3)(x + 4) = 0;
10x2-(2x-3)(5x-1) = 31;
(x - 2)(x - 3) - (x + 2)(x - 5) = 0.