Question

If x= 2 and y = 1, find the value of x⁴+y⁴ - 2 x²y²​

Answer 1

Answer:

x⁴ + y⁴ - 2x²y²

= (x²)² + (y²)² - 2 * x² * y²

= ( x² - y² )²

Now putting the value of x = 2 and y = 1 ,

= ( 2² - 1² )²

= ( 4 - 1 )²

= 3²

= 9

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