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Question
If a − b = 8, ab = 20 then a2 + b2 = ______.
Options
62
104
66
96
MCQ
Fill in the Blanks
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Solution
If a − b = 8, ab = 20 then a2 + b2 = 104.
Explanation:
a2 + b2 = (a − b)2 + 2ab
= 82 + 2(20)
= 64 + 40
= 104
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