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(a-2b)^2 - 2(a-2b)(2a-b)+(2a-b)^2 |
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Answer» ong>Step-by-step EXPLANATION: (a-2b)² - 2(a-2b)(2a-b)+(2a-b)² Let a-2b=x and 2a-b=y x²-2xy+y²=(x-y)² Here x=a-2b and y=2a-b (x-y)²=(a-2b-(2a-b))² =(a-2b-2a+b)² =(-a-b)² =(-1)²(a+b)² =(a+b)² So, (a-2b)² -2(a-2b)(2a-b)+(2a-b)²=(a+b)² |
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