Question

state the value of the discriminant and then the nature of the solutions -7x^2+2x-15=0

Answer 1

D=424
they are real and distinct

Answer 2

how many solutions

Answer 3

two

Answer 4

discriminant=424
they are rel and distinct roots

Answer 5

Discriminant \[D = b ^{2} - 4ac\]

Answer 6

roots are-23/14 and 19/14

Answer 7

Your equation is in form
\[ax^2+bx+c=0\]
This is your equation
\[-7x^2+2x-15=0\]
where a=-7, b=2, c=-15
Find discriminant with this formula:
\[D=b^2-4ac=2^2-4(-7)(-15)=4-420=-416\]
There is no roots. Parabola don't cross the x axis.

Answer 8

disagree

Answer 9

oops sorry. i agree with id21

Answer 10

@id21 u r wrong

Answer 11

actually id21 is right

Answer 12

pellet everybody added id in d race !!!

Answer 13

there is a mistake in the question

Answer 14

:D

Answer 15

the question is right there is no mistake

Answer 16

is it -7 or 7

Answer 17

-7

Answer 18

how many solutions and are they real or imaginary

Answer 19

There are no real solutions. Can find only imaginary.