(2) Find the value using expansion formula : (i) (997)²
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Answer:
(997) ²=994009
Step-by-step explanation:
(997)²
=(1000-3)²
=1000²-2*1000*3+3²[using (a-b)²=a²-2ab+b²]
=1000000-6000+9
=994009
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