pls help...
Factories...4(x–y)²–28(x²–y²)+49(x–y)2
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4(x+y)² - 28(x+y)(x-y) + 49(x-y)²
=> {2(x+y)}² - 2 × 2(x+y) × 7(x-y) + {7(x-y)}²
=> {2(x+y) - 7(x-y)}²
=>{2x+2y- 7x+7y}²
=>{9y-5x}² [THIS IS YOUR REQUIRED ANSWER ][PLEASE MARK AS THE BRAINLIEST
=> {2(x+y)}² - 2 × 2(x+y) × 7(x-y) + {7(x-y)}²
=> {2(x+y) - 7(x-y)}²
=>{2x+2y- 7x+7y}²
=>{9y-5x}² [THIS IS YOUR REQUIRED ANSWER ][PLEASE MARK AS THE BRAINLIEST
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