find the square without actual multiplication 90
Answers
Answered by
0
Step-by-step explanation:
90²=(100-10)(100-10)
=(100×100)-(100×10)-(10×100)+(10×10)
=10000-1000-1000+100
=8100
Answered by
0
Answer: 8100
Step-by-step explanation:
it easiest to multiply-
⇒ 90² = (9x10)² = 9²x10²
= 81 x 100
⇒ 8100
It was the easiest way, other methods are possible but .............more tedious.
hope u liked it!! : )
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