The question asks to find the value of $x^{2} + \frac{1}{x^{2}}$ given the initial condition $x + \frac{1}{x} = 2$. This can be solved by squaring the given equation.
Step 1: Write down the given equation.
The provided equation is:
$x + \frac{1}{x} = 2$
Step 2: Square both sides.
Squaring both sides of the equation allows us to introduce the terms $x^2$ and $\frac{1}{x^2}$.
$ \left(x + \frac{1}{x}\right)^{2} = (2)^{2} $
Step 3: Expand the left side.
Use the algebraic identity $(a+b)^2 = a^2 + 2ab + b^2$. Here, $a=x$ and $b=\frac{1}{x}$.
$ x^{2} + 2(x)\left(\frac{1}{x}\right) + \left(\frac{1}{x}\right)^{2} = 4 $
Step 4: Simplify the expanded equation.
The middle term $2(x)\left(\frac{1}{x}\right)$ simplifies to $2$.
$ x^{2} + 2 + \frac{1}{x^{2}} = 4 $
Step 5: Isolate the desired term.
Subtract 2 from both sides to find the value of $x^{2} + \frac{1}{x^{2}}$.
$ x^{2} + \frac{1}{x^{2}} = 4 - 2 $
Step 6: Final result.
$ x^{2} + \frac{1}{x^{2}} = 2 $
The value of the expression $x^{2} + \frac{1}{x^{2}}$ is 2.
In the given question, two equations numbered l and II are given. Solve both the equations and mark the appropriate answer.
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If P and Q are the points on the line Joining A(-2, 5) and B(3, 1) such that
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If 3x + 2y = 15, and xy = 6. Find the value of (3x3/2) + (4y3/9).