Question

If x+y=8 and 2^x+2^y=40, then find x,y.​

Answer 1

Answer:

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Step-by-step explanation:

it help u

Answer 2

Answer:

x= 3, y=5 or x=5,y=3

Step-by-step explanation:

y= 8-x

=> 2^x + 2^(8-x) =40

=>2^x + (2^8/2^x)=40

=> (2^x)^2 -40×2^x +2^8 =0

roots for this equation are

2^x = 8 or 32

=> x=3 or 5

for x=3, y=5

for x=5, y=3