ssusmanw
ssusmanw ssusmanw
  • 24-01-2017
  • Mathematics
contestada

let x^2+2x-15 =0 use quadratic formula to find the roots. (roots are whole numbers)

Respuesta :

David1993
David1993 David1993
  • 25-01-2017
Hello!

We have:

X^2 + 2x-15 = 0

Where:

a = 1
b = 2
c = -15

Delta = b^2 -4.a.c

D = 2^2 - 4.1.(-15)

D = 4 + 60

D = 64

We know,

x = [ -b+/-Raiz(delta)]/2a

x = [ -2 +/- Raiz(64)]/2

x = [-2 +/- 8]/2

Then,

x' = (-2-8)/2 <=> -5

And

x" = (-2+8)/2 <=> 3
Answer Link

Otras preguntas

Calculate The scale factor of XYZ to you UVW enter answers as a whole number as a fraction in lowest terms using the slash mark for the fraction bar
True or False: The Oregon Trail has been designated a national historic trail.
(16 POINTS) (EXPLAIN ANSWER!!)
In an engine, there are cylinders where the pistons travel up and down. The cylinders fill with a gas the eventually ignites which creates the combustion needed
4) FRIDAY: An unknown quantity which is represented by a letter or a symbol is called _____ -extraneous -a constant -a variable -None of these
SOMEONE PLEASE HELP ME ASAP PLEASEEE!!!​
Which of the following is an example of a function with a domain (-infty,+infity) and a range (-infity,infity) ? A. f(x) = (2x)".5 B. f(x) = (2x).25 C. f(x) = (
Lisa's soccer game ended at 6:00 the game was 1 hour and 25 minutes long when did it begin​
11. Viruses come in many different structures. What would these different virus structures likely have in common? What might be different?
What was the last name sally ride was married to a 6 letter word