Expand: (x2y – yz2)-2 – InterviewSolution

1.	Expand: (x2y – yz2)-2
Answer» Given (x²y – yz²)^-2 According to the identity (a – b)²=a²-2ab+b²we have to expand the given expression, (x²y – yz²)^-2= (x²y)²-2 (x²y)( yz²)+( yz²)² (x²y – yz²)^-2= x⁴y²-2x²y²z²+y²z⁴

Expand: (x2y – yz2)-2

Answer»

Given (x²y – yz²)^-2

According to the identity (a – b)²=a²-2ab+b²we have to expand the given expression,

(x²y – yz²)^-2= (x²y)²-2 (x²y)( yz²)+( yz²)²

(x²y – yz²)^-2= x⁴y²-2x²y²z²+y²z⁴