Using the identity (a+b) square =a square + b square + 2ab or ( a-b) square =a square+b square - 2ab find the square s of the following numbers
A. 99
B. 51
C. 38
Answers
Answered by
7
Answer:9801, 2601, 1444
Step-by-step explanation:
99^2= (100-1)^2= 100^2+1^2-2×100×1
= 10000+1-200= 9801
51^2=(50+1)^2= 50^2+1^2+2×50×1= 2500+1+100
= 2601
38^2= (40-2)^2= 40^2+2^2-2×40×2
= 1600+4-160= 1444
Answered by
0
Answer:
Correct option is A)
99
2
=(100−1)
2
It is the form of (a−b)
2
, where a=100,b=1
Applying the formula (a−b)
2
=a
2
+b
2
−2ab
99
2
=(100−1)
2
=100
2
+1
2
−2×100×1=10000+1−200=9801
Step-by-step explanation:
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