Question

if X + 2 Y is equal to 8 and X Y is equal to 2 find the value of x square + 4 y square​

Answer 1

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Answer 2

Holaaa Mate

Answer:

Given,

x+2y=8

xy=2

Now,

x+2y=8

=>(x+2y)^2=(8)^2

=>x^2+2.x.2y+(2y)^2=64

=>x^2+4xy+4y^2=64

=>x^2+4y^2=64-4xy

=>x^2+4y^2=64-4×2

=>x^2+4y^2=64-8

=>x^2+4y^2=56