If you multiply \(x\) into \(x + x\), you would distribute the \(x\) to both terms within the parentheses. Here's how the multiplication would look:
\(x \cdot (x + x) = x^2 + x^2\)
Simplifying this expression, you get:
\(x^2 + x^2 = 2x^2\)
So, multiplying \(x\) into \(x + x\) results in \(2x^2\).