If the one root of the quadratic equation ax ^(2) - 5x + 2 = 0 is 2 then the other root is​

Question

If the one root of the quadratic equation


`ax ^(2) - 5x + 2 = 0`
is 2 then the other root is​

Answer 1

½

Explanation:

If 2 is a root:

a(2)² - 5(2) + 2 = 0

4a - 10 + 2 = 0

4a = 8

a = 2

2x² - 5x + 2 = 0

2x² - 4x - x + 2 = 0

2x(x - 2) - 1(x - 2) = 0

(x - 2)(2x - 1) = 0

x = 2, ½