Question

4x^2+y^2=a and xy=b find the value of 2x+y

Answer 1

it is helpful for you

Answer 2

$4x^2 + y^2 = a$   ----1equation

xy = b 
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Adding 4xy on both sides in 1equation.


$4x^2 + y^2 + 4xy = a +4xy$  
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(by Formula $(a+b)^2 = a^2 + b^2 + 2ab$
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$(2x + y)^2 =a +4xy$


$2x +y = \sqrt{a + 4b}$


i hope this will help you


-by ABHAY