yogebba
yogebba
27-06-2017
Mathematics
contestada
What are the solutions of –x2 + 4x = x – 4?
Respuesta :
cfwscsevcfcv
cfwscsevcfcv
27-06-2017
i think the answer is x= -1 or x= 4
Answer Link
mathelp00
mathelp00
27-06-2017
Hello,
-x²+4x=x-4;
-x²+4x-x+4=0
-x²+3x+4=0
x²-3x-4=0
∆=b²-4ac=(3)²-4(-4)(1)=9+16=25
x₁,₂=-b±√∆/2a=3±5/2
x₁=3-5/2=-2/2=-1
x₂=3+5/2=8/2=4
Therefore the solutions are
x=-1 and x=4
bye :-)
Answer Link
VER TODAS LAS RESPUESTAS ( 63+ )
Otras preguntas
non cash investing and financing activities may be disclosed in
gender role refers to
One major barrier to entry under pure monopoly arises from a. the bost of the infrasturcture needed to produce b. the price taking ability of the monpoly c. dis
La altura de un rectángulo es x+19 y su ancho es x al cuadrado +2x cual es su área total?
A nurse is preparing a sterile field. The nurse should identify that which of the following actions contaminates the sterile field? -A cotton ball dampened with
How do I do this. For geometry proofs
what did theodore rossevelt mean to compare his policy to a hand of cards
if A shop owner offered a 20% discount off the regular price of a mirror. The amount of the discount is $3. What is the regular price of the mirror?
pls ?? :(only 11, 13
c2h5 lewis structure
