Question

if 9x²+1/9x²=47, find the value of 3x+1/3x​

Answer 1

Answer:

7

Step-by-step explanation:

We know that (3x + 1/3x)² = 9x²+1/9x² + 2

=> (3x + 1/3x)² = 47 + 2

=> (3x + 1/3x)² = 49

=>

(3x + 1/3x) = 7

Answer 2

(3x+1/3x)^2=9x^2+1/9x^2+2=47+2=49
Therefore, (3x+1/3x)=7, -7
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