Question

please solve this question... ​

Answer 1

solution is: 3a^2-12ab+12b^2-5a+10b

Answer 2

Answer:

3a² - 5a - 12ab + 10b+ 12b²

Step-by-step explanation:

3(a - 2b)² - 5(a-2b)

(a-b)²=a²-2ab + b²

=3[(a)² - 2(a)(2b) + (2b)²] - 5a+10b

=3[a² - 4ab + 4b²] - 5a+10b

=3a² - 12ab + 12b² - 5a+10b

=3a² - 5a - 12ab + 10b+ 12b²

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