please solve this question...
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solution is: 3a^2-12ab+12b^2-5a+10b
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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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