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Aptitude · Q521

Algebra

Competitive Exams · Aptitude · question 521

Q521

If a = 1 + √3, b = 1 - √3, then what is the value of a2 + b2?

A.
4
B.
8
Answer
C.
0
D.
2

Answer: Option B

Solution

Answer: Option B
Solution:
a = 1 + √3
∴ a2 = 1 + 3 + 2√3
b = 1 - √3
∴ b2 = 1 + 3 - 2√3
∴ a2 + b2 = 8