1.

(a2+b2)(-a2+b2)find the answer I'll mark u as brainliest​..pls urgent..

Answer»

(a
2
+B
2
)(−a
2
+b
2
)=(b
2
+a
2
)(b
2
−a
2
)
=(b
2
)
2
−(a
2
)
2

[USING: (a+b)(a−b)=a
2
−b
2
]
=b
4
−a
4


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