What is to be added to 49x^2+4y^2 to get a perfect square?
Answers
Answered by
3
Step-by-step explanation:
49 x² = 7²×x² = (7x)²
4y² = 2²×y² =(2y)²
it should be in form of a²+2ab+b²
we have a²+b² we need 2ab to be added
= 2*7x*2y = 28xy
we need to add 28xy to make it perfect square
49x²+4y²+28xy = (7x + 2y)²
Answered by
3
Answer:
28xy is the correct answer.
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