Find roots : x² - (2b - 1)x + (b² - b - 20) = 0

Find x : x² - (2b - 1)x + (b² - b - 20) = 0
x^2-(2b-1)x+(b^2-b-20)=0
x²-(2b-1)x+ (b²-b-20) = 0
Solve for x : x^2 - (2b - 1)x + (b^2 - b - 20) = 0
#math