gavinparker85 gavinparker85
  • 05-05-2020
  • Mathematics
contestada

What are the solutions of the equation (x + 2)2 – 2(x + 2) – 15 = 0? Use u substitution to solve.

Respuesta :

ghanami
ghanami ghanami
  • 05-05-2020

Answer:

Step-by-step explanation:

hello :

(x + 2)2 – 2(x + 2) – 15 = 0

let : t= x+2

t²-2t-15 =0

(t-5)(t+3)=0

t-5=0  or t+3=0

t=5 or t=-3

but  : t =x+2  

if : t=5    x+2 =5   so : x=3

if : t= -3     x+2 = -3   so : x= -5

conclusion two solutions : 3  , -5

Answer Link

Otras preguntas

What would be the approximate weight gain of a person who consumes an excess of 500 kcalories daily for one month?
How do you do Mixed Numbers On Number Lines?
One cost and one benefit of the specialization of an industry in Louisiana's economy is
You should draft your thesis statement A. right after you write one focus question. B. right after you develop your outline. C. just before you narrow your
Why does "The Monk's Tale" fit the category of parable? A. It emphasizes the important events of a particular time period. B. It tells the results of different
Are Muscle contractions in the large intestine faster than the small intestines muscle contractions
ONE MULTIPLE CHOICE QUESTION PLZ!
PLEASE HELP ASAP!!!! Like the Arabs of the West Bank and Gaza Strip, many Israeli Arabs consider themselves to be A. Druze. B. Lebanese. C. Palestini
What do parokyotes and eurokyotes have in common?
tips for answer directed writing and creative writing in O'level paper