a+1/a=2 donner la valeur de a²+1/a²
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Answered by
3
Answer:
a + 1/a = 2
=> (a + 1/a)² = 2 ² ( squaring both sides)
=> a² + 1/a² + 2 × a × 1\a = 4
=> a² + 1 \a² +2 = 4
=> a² + 1/a² = 4 -2 = 2
Answered by
36
Step-by-step explanation:
a + 1/a = 2
=> (a + 1/a)² = 2 ² ( squaring both sides)
=> a² + 1/a² + 2 × a × 1\a = 4
=> a² + 1 \a² +2 = 4
=> a² + 1/a² = 4 -2 = 2
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