If x = 3 + √2 then find the value of x² - 1/x2
(A) 24
(B) 42
(C) 24√2
(D) 42 √2
Answers
Answered by
0
Answer:
Step-by-step explanation:jkkkm
Answered by
0
Answer:
7
Step-by-step explanation:
(3+√2)² - 1/(3+√2)²
=> (3+√2)² - (1/3+√2)²
=> (3+√2)(3-√2) [a²-b² = (a+b)(a-b)]
=> 3(3-√2) +√2(3-√2)
=> 9-3√2+3√2-2
=> 9-2
=> 7
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