Question
Using suitable identities, evaluate the following.
$(1005)^2$
$(1005)^2$
✓
Answer
$(1005)^2= (1000 + 5)^2$
$= (1000)^2+ (5)^2+ 2 × 1000 × 5$
$= 1000000 + 25 + 10000$
$= 1010025$
$= (1000)^2+ (5)^2+ 2 × 1000 × 5$
$= 1000000 + 25 + 10000$
$= 1010025$
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