x2−9x+20=0x^{2}-9x+20=0
a=1a=\textcolor{#B14BA5}{1}
b=−9b=\textcolor{#D24040}{-9}
c=20c=\textcolor{#3172E0}{20}
x=−(−9)±(−9)2−4⋅1⋅202⋅1x=\frac{-(\textcolor{#D24040}{-9})\pm \sqrt{(\textcolor{#D24040}{-9})^{2}-4\cdot \textcolor{#B14BA5}{1}\cdot \textcolor{#3172E0}{20}}}{2\cdot \textcolor{#B14BA5}{1}}
