X {}^{2} + y {}^{2} - 2xyx 2
+y
2
−2xy
c {}^{2}-6c + 9c
2
−6c+9
4a {}^{2} -a + 14a
2
−a+1
- b {}^{2} - 4b - 4−b
2
−4b−4
c {}^{2} - 10cd { }^{2} + 25d {}^{4}c
2
−10cd
2
+25d
4

9n {}^{4} + 12n {}^{2} m - 4m {}^{2}9n
4
+12n
2
m−4m
2

те

Ilonka2734    3   19.01.2021 17:45    0