Find the square of the following numbers using ( x + y)square = x square + 2 xy + y square . ? 199
Answers
Answered by
0
Answer:
39601
Step-by-step explanation:
(100+99) equal to (100) sq + 2*100*99+(99)sq
10000+19800+9801
39601
Answered by
1
(x+y)² = x²+y²+2xy
199 = (200-1)²
= 200²+1²-2*200*1
= 40000+1-400
= 39601
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