Question

If 4x^2+ y^2 =40 and xy =6 then find 2x+y.​

Answer 1

Step-by-step explanation:

We have,

(2x+y)

2

=(2x)

2

+y

2

+2×2x×y

⇒(2x+y)

2

=(4x

2

+y

2

)+4xy

⇒(2x+y)

2

=40+4×6⇒(2x+y)

2

=64

⇒2x+y=±

64

⇒2x+y=±8

Answer 2

Answer:

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