Question

Find a if (a+3)x2 -4x +2<0
For all x belongs to [-2,1]

Answer 1

Answer:

if x= -2

(a+3)*2-4*(-2)+2=0

2a+6+8+2=0

2a+16=0

2a= -16

a= -8

and if x=1

(a+3)*2-4(1)+2=0

2a+6-4+2=0

2a+4=0

2a= -4

a= -2