Question

4. The Value of (99)2 is
a) (90)2 + (9)2 b) (90)2 + 2(90)(9) + (9)2 c) (90)2 -2(90)(9) + (9)2
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Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:

Step-by-step explanation:

(99)^2

using by the expression (a-b)^2= a^2 +b^2  2ab

(100)^2 = (100-1)^2

             = 100^2 +3^2 - 2(100x3)

             =10000+ 9 - 2(300)

             =10009 - 600

             = 9409

hope it helps