dawnmsinagra dawnmsinagra
  • 02-06-2020
  • Mathematics
contestada

solve the system of equations y=4x+1, y=x2+2x-2

Respuesta :

turtlefishangel
turtlefishangel turtlefishangel
  • 02-06-2020
option D
(-1,-3) and (3,13)

Given in the question two equations
y = 4x + 1
y = x² + 2x - 2
Equate both functions
4x + 1 = x² + 2x - 2
rearrange the x term and constant
-x² + 4x - 2x + 2 + 1 = 0
-x² + 2x + 3 = 0
factors
-x * 3x = -3x²
-x + 3x = 2x
-x² -x + 3x + 3 = 0
-x(x+1) +3(x+1) = 0
solve
(x+1)(3-x) = 0
x = -1
and
x = 3
Plug these values in equation to find y
x = -1
y = 4(-1)+ 1
y = -3
x = 3
y = 4(3)+ 1
y = 13
Answer Link
dhshshshsb dhshshshsb
  • 02-06-2020
Option d is the answer to your question
Answer Link

Otras preguntas

Put brackets in the expression below so that it's value is 45.024. 1.6 + 3.8 * 2.4 *4.2 (*= times )
Determine the half-life of potassium if in 3460 years a 200 g sample decayed into 25 g
what are two human uses for mosses?
what percentage of 1457 is 898?
what describes the solvent in any solution
How many light sources do you know Pls list them
The diagram shows a patio in the shape of a rectangle. The patio is 3.6m long and 3m wide. Mathew is going to cover the patio with paving slabs. Each paving sla
Why does a pendulum eventually stop swinging?
The sum of a number and 18 times its reciprocal is 11. Find the number(s). Let x represent the unknown number. The Reciprocal of x is____?
how are the themes and topics different