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

Write an equation of an ellipse in standard form with the center at the origin and a height of 12 units and width of 19 units.
To find the circumference of a circle multiply the diameter by?
How does a bony fish use the swim bladder?
A 2-pound bag of broccoli costs $2.88. What is the price per ounce
A bicyclist notes that the pedal sprocket has a radius of rp = 9.5 cm while the wheel sprocket has a radius of rw = 6.5 cm. The two sprockets are connected by a
Please help I will mark brainliest
wwe cm punk championship when did he win it
Select the correct answer from each drop-down menu. The graphs below show the number of faulty products, y, produced by a company for the first eight months sin
A company is considering the purchase of a new machine for $48,000. Management expects that the machine can produce sales of $16,000 each year for the next 10 y
What is the slope of the line that contains the points (-2,7) and (2, 3)?