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

please help me A bumblebee visits 14 flowers in 38 minutes to collect pollen. A butterfly's progress in visiting flowers is shown in the table. Which insect is
How would you describe the elements from Group 1 to Group 12 in the periodic table?
9- When the moon comes in an orbit higher from earth, ......... solar eclipse are formed. a) total b) annular c) partial. d) an
Nikola buys a bouquet of 8 sunflowers for $18. What is the cost of 1 sunflower?
What did the surface of the Earth look like 250 million years ago?
each Rubber ball is = to 2 balls btw, Find the median of the data in the pictograph below.
the chief justice of supreme court is appointed by ___​
"Crimes against property" are much more common than "crimes against persons." 1) True 2 False
Cos of 16/34 Sin 32/40 Tan 32/24
Find the value of x. Please help will mark brainliest!