Find all real solutions of the equation by completing the square \( x^{2}-10 x+20=4 \).
\( x_{1}=\square \) with \( x_{1} \) Next Question
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To solve the equation \( x^{2}-10x+20=4 \) by completing the square, we first rearrange the equation:
\( x^{2}-10x+16=0 \).
Now, to complete the square, we can rewrite the quadratic expression. First, take half of the coefficient of \( x \) (which is -10), square it, and add it inside the completed square:
\[
x^{2}-10x+25-25+16=0 \implies (x-5)^{2}=9.
\]
Taking the square root of both sides gives us:
\[
x - 5 = 3 \quad \text{or} \quad x - 5 = -3.
\]
This simplifies to:
\[
x = 8 \quad \text{or} \quad x = 2.
\]
Thus, the solutions are \( x_{1} = 2 \) and \( x_{2} = 8 \). So, we have \( x_{1}=2 \) with \( x_{1}