Question

evaluate the following by using algebraic identity
(a) 9.9square

Answer 1

(9.9)^ 2
=》(10-0.1)^ 2
=》10^2+0.1^2-2×10×0.1
=》100+0.01-2×10×1/10
=》100+0.01-2
=》100.01-2
=》98.01

Answer 2

Answer: 98.01

Step-by-step explanation:

10square +0.01-2*10*0.1

100+0.01-2*10*1/10

100+0.01-2

100-01-2=98.01

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