Question

Solve with quadratic formula.
4k^2- 20 = k

Answer 1

Explanation:

4k² - 20 = k

4k² - k - 20 = 0

By quadratic formula :

`x = \displaystyle(-b \pm √(b^2 - 4ac))/(2a)`

x =( 1 ± √80 ) / 8

x = (1 ± 4√5)/8

Answer 2

Answer:
`k= (1+√(321) )/(8) , (1-√(321) )/(8)`

Explanation:

Move all terms to one side.

`4^(2) -20-k=0`

Use the Quadratic Formula.

`k=(1+√(321) )/(8)` ,
`k=(1-√(321) )/(8)`