Question

Can you solve x2-x-20=0 in algebra 1 explanation .

Answer 1

x = 5, x = -4

Step-by-step explanation:

Solve with the quadratic formula

`x_(1,2) =(-(-1)+-√((-1)^2-4*1*(-20)) )/(2*1)` =
`x_(1,2) = (-(-1)+-(9))/(2*1)`

Separate the solutions

`x_1 = (-(-1)+9)/(2*1) , x_2 = (-(-1)-9)/(2*1)`

`x_1 = 5\\x_2 = -4`

Answer 2

x = 5, -4

Step-by-step explanation:

Move all terms to the left side and set equal to zero. Then set each factor equal to zero.