How to solve 25a^2 - 4b^2 + 28bc - 49c^2
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25a² - 4b² + 28bc -49c²
= 25a² - ((2b)² - 2.2b.7c + (7c)²)
= 25a² - (2b - 7c)²
= (5a)² - (2b - 7c)²
= (5a+2b-7c)(5a-2b+7c)
Hence the result.
Thank you, plz give me another mathematical doubts.
= 25a² - ((2b)² - 2.2b.7c + (7c)²)
= 25a² - (2b - 7c)²
= (5a)² - (2b - 7c)²
= (5a+2b-7c)(5a-2b+7c)
Hence the result.
Thank you, plz give me another mathematical doubts.
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