Question

if x+4y=13and 2x-y=4 then (x+y)^2=

Answer 1

Answer:

2x+8y=26

2x-y=4.

subract the equation

9y=22

y=22/9

x=29/9

(x+y) ^2 =(51/9) ^2

=2601/81

ok

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