okbroo
okbroo okbroo
  • 12-06-2021
  • Mathematics
contestada

please help me solve this ​

please help me solve this class=

Respuesta :

acristofanilli1 acristofanilli1
  • 12-06-2021

Answer:

x=5, y=16

Step-by-step explanation:

y=x^2-9

y=2x+6

solve by substitution

2x+6= x^2 -9

2x+6 = (x+3) (x-3)

2 (x+3) = (x+3) (x-3)

divide both sides by x+3

2= x-3

add 3 to both sides

x=5

y= 2(5) +6

y= 16

Answer Link
mhanifa
mhanifa mhanifa
  • 12-06-2021

Answer:

  • (-3, 0), (5, 16)

Step-by-step explanation:

  • y = x² - 9
  • y = 2x + 6

Solve by substitution:

  • x² - 9 = 2x + 6
  • x² - 2x  - 15 = 0
  • x² - 2x  + 1 = 16
  • (x - 1)² = 4²
  • x - 1 = ± 4
  • x = 1 ± 4
  • x = 5 ⇒ y = 2*5 + 6 = 16
  • x = - 3 ⇒ y = 2*(-3) + 6 = 0
Answer Link

Otras preguntas

the midpoint of a segment is (2,-5), and one of the endpoints is (3,6). where is the other endpoint?
Which of the following statements about resource use is true? a. The use of renewable resources has no inherent costs. b. Resource use, whether renewable or non
How to prime minister chosen???A) Appointed by the monarchB) Elected by member of the house of lords C) Popular election D) Elected by member of the house of co
What is 30 tens 3 tens 3 tenths?
Which statement is true ?
how to write persuade somebody to by house?
Longitude and latitude are measured in degrees, minutes, and seconds. True False
Andrew Jackson and his political campaign workers founded the __________ Party.
What is the radius of the tall second cylinder with an 8.5" circumference?
definition of biomass and the defition of food chain