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Question
Factorise by the grouping method : a2x2 + (ax2 + 1) x + a
Sum
Solution
a2x2 + (ax2 + 1) x + a
= a2x2 + a + (ax2 + 1) x
= a( ax2 + 1) + x( ax2 + 1)
= ( a + x )( ax2 + 1 )
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Factorisation by Grouping
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