Question

1) 1,21a⁸ - 255c¹⁴=
2) 7mn+ 7mk=
3) x⁷ + x⁵ - 2x² - 2

Answer 1

2)7m(n+k)
3)x^5(x^2+1)-2(x^2+1)=(x^2+1)•(x^5-2)

Answer 2

1) i dont know
2)7mn+7km
3)