If 4x^2+ y^2 =40 and xy =6 then find 2x+y.
Answers
Answered by
0
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
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1
Answer:
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