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Factorise by re joining1+a²b²+a²+b² |
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Answer» (1+a²)(1+b²) Step-by-step EXPLANATION:
1+a²b²+a²+b² = 1+a²+a²b²+b² = (1+a²)+b²(a²+1) = (1+a²)(1+b²) |
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