1. The problem asks to find the value of $x$ squared when $x=10$. 2. The formula for squaring a number is $x^2 = x \times x$. 3. Substituting $x=10$ into the formula gives $10^2 = 10 \times 10$. 4. Multiplying, we get $10 \times 10 = 100$. 5. Therefore, the value of $x$ squared when $x=10$ is $100$. I found the value of the expression is 100 by substituting $x=10$ into the formula $x^2$ and calculating the product.