If x and y are two positive real numbers such that x2 + 4y2 = 40 and xy = 6, then find the value of x + 2y
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Answered by
1
Answer:
a cell is the smallest unit of life
Answered by
1
Answer:
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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