Question

Describe the nature of the roots for this equation 2x^2+5x-7=0.
A.) Two real, irrational roots
B.) One real double root
C.) Two real rational roots
D.) Two complex roots

Answer 1

First get the decremental
\[\sqrt{b ^{2}-4ac}\]
d is the inside of the root.
if it was d = 0 then one real solution.
d<0 2 imaginary
d>0 2 real

Answer 2

Sothe answer is D?

Answer 3

as the rule is \[\frac{ -b \pm \sqrt{b ^{2}-4ac} }{ 2a }\]

Answer 4

it was C :(

Answer 5

yea it is -7 not 7

Answer 6

so you get d = 81

Answer 7

i got -31...

Answer 8

You substituted wrong :P

-*- = +