If 4x square +y square= 40and xy=6, find the value of 2x + y
Answers
Answered by
1
Answer:
Sorry I don't know sorry
Answered by
2
Answer:
2x+y=8
Step-by-step explanation:
we that (a+b)^2=a^2+2ab+b^2
4x^2+y^2=40 _____(1)
xy=6______(2)
(2x+y)^2=2x^2+2*2x*y+y^2
=4x^2+4xy+y^2
=4x^2+y^2+4xy
=40+4*6
from (1) and (2)
(2x+y)^2=40+24
=64
2x+y=√64
=8.
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