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प्रश्न
Factorise the following expression.
4x2 − 8x + 4
योग
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उत्तर
4x2 − 8x + 4
= (2x)2 − 2 (2x) (2) + (2)2
= (2x − 2)2 [(a − b)2
= a2 − 2ab + b2]
= [(2) (x − 1)]2
= 4(x − 1)2
= 4(x − 1) (x − 1)
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