Expand following by suitable identity 1) (a ^ 2 + b ^ 2) ^ 2 2) (4x) ^ 3 + (5y) ^ 3
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Answer:
Using the identity (a+b)
2
=a
2
+b
2
+2ab
We get, (a
2
+b
2
)
2
=(a
2
)
2
+(b
2
)
2
+2(a
2
)(b
2
)
=a
4
+b
4
+2a
2
b
2
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