6.24. Упростите выражение:
m² + n² − k² + 2mn
m² - n² + k² + 2mk'
;
2
1)
2)
3
2
a³ – a² - a + 1
-
-;
4
a¹ - 2a² + 1
3)
4)
1-36+36²-6³
c – cb + a – ab
-
x² - ax + bx - ab
3
x³ + bx2 + ax + ab
помогите с 4
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