Question

If x+y=9 and x-y=1 than what solve x²+y²/2xy

Answer 1

Answer:

x + y = 9 ---( 1 )

x - y = 1 --- ( 2 )

solving the equations (1) & (2) ;

: : 2x = 10

: : x = 10/2

::: x = 5 :::

substitute x = 5 in eq (1) ;

5 + y = 9

: : y = 9 - 5

::: y = 4 :::

To find ,

x² + y² ÷ 2xy

(5)² + (4)² ÷ 2(5)(4)

25 + 16 ÷ 40

=> 41/40 <=

hope it helps you

Answer 2

Answer:

• 41/40

Step-by-step explanation:

x+y=9 --1

x-y=1   --2

add 1&2

we get x=5

put x=5 in --1

so, we get y = 4

• therefore, x²+y²/2xy=5²+4²/2x5x4

• =25+16/40=41/40