Разность квадратов. пример : (a-b) (a+b) = a^2 - b^2 (k+5) (k-5) (m+6) (6-m) (0.3-p) (0.3+p) (2x-1) (2x+1) (3p-k) (3p+k) (7-p) (7+p) (2c+1) (2c-1) (3t-y) (y+3t) (6x-5y) (6x+5y) (4x+3y) (4x-3y) (7p-2k) (7p+2k) (8y-3p) (3p+8y) (6x-2y) (5x+2y) (7p+9q) (7p-9q) (11x+12y) (11x-12y) (0.1x+6) (0.1x-6) (0.6p-2c) (0.6p+2c) (1.3x+3y) (1.3x-3y) (0.9-4y) (0.9+4y) (5-0.8t) (5+0.8t) (1.4b-6c) (1.4b+6c)
-m^2+36
0,09-p^2
4x^2-1
9p^2-k^2
49-p^2
4c^2-1
9t^2-y^2
36x^2-25y^2
16x^2-9y^2
49p^2-4k^2
64y^2-9p^2
36x^2-4y^2
49p^2-81q^2
121x^2-144y^2
0,01x^2-36
0,36p^2-4c^2
1,69x^2-9y^2
0,81-16y^2
25-0,64t^2
1,96t^2-36c^2
ух