Question

if x+y = 16 and xy= 18, find the value of x² + y²?​

Answer 1

Answer:

the question is wrong

pls check once more

Answer 2

Answer:

Given, x+y=9 and xy=16.

To prove : x² + y²

Proof : We know, (a+b)² =a² +2ab+b²

Then, (x+y)²=x²+2xy+y²

(9)²=x²+2(16)+y²

81=x²+32+y²

x²+y²=81−32

x²+y²=49

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