Раскройте скобки (2t+1)^2 (K^2-5y)^2 (7c+3)(7c-3)

Question

Раскройте скобки (2t+1)^2
(K^2-5y)^2
(7c+3)(7c-3)

Answer 1

= 4t^2 + 4t + 1
---------------------------
= k^4 - 10k^2y + 25y^2
----------------------------
= 49c^2 - 9

Answer 2

1) 4t^2 + 4t +1
2) k^4 -10k^2y+25y^2
3) 49c^2 - 9