mckailey mckailey
  • 23-05-2022
  • Mathematics
contestada

Solve the system of equations:
y=2x
y=x²-8

Respuesta :

angstar4
angstar4 angstar4
  • 23-05-2022
Set equal to each other
x^2 - 8 = 2x
x^2 - 2x - 8 = 0

Factor
(x - 4)(x + 2) = 0
x = 4 or x = -2

Plug in 4
y = 2x or y = x^2 - 8
y = 2(4) or y = 4^2 - 8
y = 8

Plug in -2
y = 2x or y = x^2 - 8
y = 2(-2) or y = (-2)^2 - 8
y = -4

There are two solutions
(4, 8) and (-2, -4)
Answer Link

Otras preguntas

When a parent herring gull arrives at the nest with food, a chick will orient to and peck at the red spot on the parent's bill. The parent will then regurgitate
All cell activity is controlled by the ?
What were John Cabot's accomplishments?
An elementary school survey found that 450 of the 700 students preferred soda to milk. Suppose 10 children from the school are attending a birthday party. What
5.25 make 1 centimeter
which continent has moved the least since pangea
What is definition for a Functional relationship... A functional relationship is not
1. How can Georgia citizens best influence Georgia's government?
A baseball fits snuggly inside a cubical box that is 3 inches on each side. Find the volume of the cubical box. (WILL MARK AS BRAINLIEST) help is much appreciat
A ladder 25 feet long is leaning against the wall of a house. The base of the ladder is pulled away from the wall at a rate of 2 feet per second. How fast is th