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What do we get after factoring 49x2- 28xy + .4y2?
  • a)
    (7x+2y)2
  • b)
    (49x-4y)2
  • c)
    (7x-2y)2
  • d)
    (7x-28y)2
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
What do we get after factoring 49x2- 28xy + .4y2?a)(7x+2y)2b)(49x-4y)2...
We know that a2 - 2ab + .b2 = (a-b)2
49x2 - 28xy +.4y2 can also be written as (7x)2 - 2(7)(2)xy + (2y)2
Here, a = 7x and b = 2y.
Therefore, 49x2 - 28xy+.4y2 = (7x)2 - 2(7)(2)xy + (2y)2
= (7x - 2y)2.
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What do we get after factoring 49x2- 28xy + .4y2?a)(7x+2y)2b)(49x-4y)2c)(7x-2y)2d)(7x-28y)2Correct answer is option 'C'. Can you explain this answer?
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