am82468
am82468 am82468
  • 25-06-2020
  • Mathematics
contestada

Solve the system y = 2x – 4 and y = (x – 1)² – 5

Respuesta :

osikbro
osikbro osikbro
  • 25-06-2020

Answer:

[tex]x=2\pm\sqrt{3}[/tex]

[tex]y=\pm 2\sqrt{3}[/tex]

Step-by-step explanation:

Since both equations are equal to y, you can set them equal to each other.

[tex]2x-4=(x-1)^2-5 \\\\\\2x-4=(x^2-2x+1)-4 \\\\\\2x-4=x^2-2x-3 \\\\\\x^2-4x+1=0 \\\\\\x=\dfrac{4\pm\sqrt{16-4}}{2}=\dfrac{4\pm2\sqrt{3}}{2}=2\pm\sqrt{3} \\\\\\y=2(2\pm\sqrt{3})-4=\pm 2\sqrt{3}[/tex]

Hope this helps!

Answer Link

Otras preguntas

what are details of u-boats
Please answer correctly! I will mark you as Brainleist!
Find the surface area of the following figure below. Use 3.14 for pi
A restaurant ordered 6 boxes of eggs. Each box holds 5 trays, and each tray holds 36 eggs. How many eggs did the restaurant order? A 1,080 B 396 216 180
NEED HELP WITH THIS DUE IN 30 min!!!
An adult takes 400 mg of vitamin C. Each hour, the amount of vitamin C in the person's system decreases by about 29%. Estimated to the nearest hundredth, how
It’s a giveaway... again (‘: But it’s a really small one :D To make this educational, what is 1+2+3+4?
polyatomic ion of (NH4)2O
What two words might describe the timbre of the clarinet?
I need help with this question..