B) factorise
a*4 _(a-b)*4
Answers
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Step-by-step explanation:
Given, a
4
−b
4
=(a
2
)
2
−(b
2
)
2
=(a
2
+b
2
)(a
2
−b
2
)(∵x
2
−y
2
=(x+y)(x−y))
=(a
2
+b
2
)(a+b)(a−b)
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