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a) 990075
b) 990925
c) 990025
d) 990035
correct answer is: c) 990025
[formula use: (a-b)^2 = a^2-2.a.b+b^2 ]
Explanation
(995)^2
\rightarrow (1000 - 5)^2
\rightarrow (1000)^2 – 2.1000.5 + (5)^2
\rightarrow 1000000 – 10000 + 25
\rightarrow 990000 + 25
\rightarrow 990025
Ans: 990025.
