English, asked by devkikhillan, 6 months ago

(2a-b+3c) ( 2a -b- 3c) simplify step by step explaination plz ​

Answers

Answered by tanishkbelwal
10

Answer:

4a^2 + b^2 + 9c^2 - 4ab

Explanation:

(2a - b + 3c ) (2a - b - 3c)

= 4a^2 - 2ab - 6ac -2ab + b^2 + 3bc + 6ac - 3bc - 9c^2

= 4a^2 + b^2 + 9c^2 - 4ab

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