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Question
If a = 3, b = 0, c = 2 and d = 1, find the value of a2 + b2 − c2 + d2
Sum
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Solution
a2 + b2 − c2 + d2
= (3)2 + (0)2 − (2)2 + (1)2
= 9 + 0 − 4 + 1
= 6
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