Square of 93 without actual multiplication
Answers
Answered by
3
Answer:
(100-7)²
= a²+b²-2ab
therefore, (100)²+(7)²-2(100)(7)
=10000+49-1400
=8649. (by bodmas rule)
Answered by
2
Step-by-step explanation:
(90+3)raise to 2
use formula (a+b)raise to 2= a square +b square +2ab
90square+2(90)(3)+3 square
=8100+540+9
=8649
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