Question 795242
9x²y² = 9y²+x²
<pre>
I'm sorry, but that is not true for all values of x and y

It is true when x and y are both 0, and for certain irrational
numbers.  But for instance if

     x=2 and y=1

Substitute in

    9x²y² = 9y²+x²

9(2)²(1)² = 9(2)²+(2)²
  9(4)(1) = 9(4)+4
       36 = 36+4
       36 = 40

which is false.

Edwin</pre>