Question

x2 – x – 20 = 0 help meeee

Answer 1

a= 1
b= -1
c= -20

$delta \: = {b}^{2} - 4ac$
delta= -1^2 -4.1.-20
delta= 1 +80
delta= 81

$x \: = - b \: + - \sqrt{delta}$
x'= -(-1) + 9
x'= +1 +9
x'= 10

x"= -(-1) -9
x"= +1 -9
x"= -8