evaluate using suitabledentities
2.(b-7 )square
using identity : 103×104
Answers
Answered by
3
Step-by-step explanation:
1. (b-7)2
=b^2-2×(b)×(7)+-7^2
b^2-14b+49
2. 103×104
(100+3)(100+4)
100^2+100(3+4)+(3×4)
10000+700+12
10712
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Answered by
2
Answer:
10712
Step-by-step explanation:
= (100+3) + (100+4)
=(100)^2 + (4+3) *100 +(4*3)
=(10000) + 700 + 12
= 10712
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