Question
The value of the expression (1.55²  + 0.55²  + 1.55
× 0.55) is equal to:Solution
Given: (1.55²  + 0.55²  + 1.55 × 0.55)
= 2.4025Â +Â 0.3025Â +Â 0.8525Â =Â 3.5575
Now check options:
A: 1.552−0.552=2.11.55^2 - 0.55^2 = 2.1 1.5 5 2 − 0.5 5 2 = 2.1
B: 1.553−0.553=3.55751.55^3 - 0.55^3 = 3.5575 1.5 5 3 − 0.5 5 3 = 3.5575
C: 1.553+0.553=3.887251.55^3 + 0.55^3 = 3.88725 1.5 5 3Â +Â 0.5 5 3Â =Â 3.88725
D: 1.552+0.552=2.7051.55^2 + 0.55^2 = 2.705 1.5 5 2Â +Â 0.5 5 2Â =Â 2.705
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