Question

if one of the zeros of the quadratic polynomial
$2 {x }^{2} - 8x - m$
is
$\frac{5}{2}$
then find the other zeros​

Answer 1

Answer:

3/2

Step-by-step explanation:

When x=5/2, it equals zero.

put x=5/2 to get m

2 * 25/4 - 8 * 5/2 - m = 0

m = 25/2 - 20 = - 15/2

2x^2 - 8x + 15/2 = 0

4x^2 - 16x + 15 = 0

 2x                -3

 2x                -5

x=3/2 or x=5/2