Question

1. x2 - 100x + 1 > 0 2. x2 + 8x - 105 > 0 3. x2 - 2x - 3 < 0 4. x2 + 9x +14 > 0 5. 3 s2 - 5s = 1 it is quadratic inequality or not​

Answer 1

∆=b^2-4ac=0

i) a=1, b=-100, c=1

∆=10000-4

=9996>0

ii) a=1, b=8, c=-105

∆=8^2-4(-105)

=64+820

=884>0

iii) a=1, b=-2, c=-3

∆=(-2) ^2-4(-3)

=4+12

=16 it is not less than zero