Question

Plz ans me that 4th one

Answer 1

Answer:

23

Step-by-step explanation:

x +1/x = 5

squaring both sides

(x+1/x)^² = 25

expanding

x^² + 2 + 1/x^² = 25

therefore

x^² + 1/x^² = 23.

Answer 2

Find the value:

Step-by-step explanation:

$\ Given \ value:\\\\\ x\ + \frac{1}{x} = 5\\\\\ Find: \\\\\ x^2\ + \frac{1}{x^2} = ? \\\\\ Solution: \\\\\ formula: \\\\(a+b)^2= a^2+b^2+ 2ab\\\\\rightarrow (\ x\ + \frac{1}{x})^2 \ = \ x^2\ + \frac{1}{x^2} +2.x.\frac{1}{x} \\\\\rightarrow (5)^2 \ = \ x^2\ + \frac{1}{x^2} +2 \\\\\rightarrow 25 - 2\ = \ x^2\ + \frac{1}{x^2} \\\\\rightarrow \ x^2\ + \frac{1}{x^2}=23$

Learn more:

• Find the value: https://brainly.in/question/7833010