Question

If one of the zeroes of the polynomial p(x) = 2x² - 8x - m is 5/2, find m and the other zero.

Answer 1

0=2×(5/2)square -8×5/2-m
0=25/2-20-m
0=(lcm)-15/2-m
15/2=-m
-15/2=m
value of m comes when we put x=5÷2

Answer 2

heya !!

Put x = 5/2 in given eq.....

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

2×25/4 - 8×5/2 = 0

25/2-20- m = 0

25-40-2m=0

-15 -2m = 0

m = -15/2

glad help you.
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vaibhav246