Question

if one zero of quadratic polynomial of 2x^2 -8x - m is 5/2. find m and pther zero

Answer 1

Answer:

3/2

explanation:

2x^2-8x-m=0

substitute 5 by 2 instead of x

2(5/2)^2-8(5/2)-m=0

2×25/4-40/2-m=0

25/2-40/2-m=0

-15/2-m=0

m=-15/2

substitute -15/2 instead of m

2x^2-8x+15/2

use the equation,

(-b plus or minus √b^2 -4ac )÷2a

refer image