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प्रश्न
Factorise.
16x5 − 144x3
योग
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उत्तर
16x5 − 144x3
= 16x3(x2 − 9)
On writing it as follows:
= 16x3 [(x)2 − (3)2]
Using the identity a2 − b2 = (a − b) (a + b)
= 16x3 (x − 3) (x + 3)
= a2 − b2
= (a − b) (a + b)
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