What is to be added to 49x^2 + 4y^2 to make a perfect square?
Answers
Answered by
7
Answer:
28xy
Step-by-step explanation:
49x² + 4y²
= (7x)² + (2y)²
consider (7x+2y)²
which is = (7x)² + (2y)² + 2(7x)(2y)
(7x+2y)² = (7x)² + (2y)² + 28xy , is a perfect square
=> To make 49x² + 4y² a perfect square, we have to add 28xy
Answered by
2
Answer:
28xy is the correct answer.
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