Question

Please answer math question
OUES - 6 AND 7

Answer 1

#6.

2x+1=0

x=-1/2

now, use this value in 2x^2-5x+a

2(-1/2)^2-5(-1/2)+a

2*1/4+5/2+a

1/2+5/2+a

6/2+a

3+a

a=-3

similarly,2x^2+5x+b

2(-1/2)^2+5(-1/2)+b

2*1/4-5/2+b

1/2-5/2+b

-4/2+b

-2=-b

b=2