SOLUTION: Solve the system of equations: Y=2x2+3 Y=x+2 Enter one point as (x,y) Enter teo points as (x,y),(x,y) Enter"no solution" as DNE.

Algebra ->  Coordinate Systems and Linear Equations  -> Lessons -> SOLUTION: Solve the system of equations: Y=2x2+3 Y=x+2 Enter one point as (x,y) Enter teo points as (x,y),(x,y) Enter"no solution" as DNE.      Log On


   



Question 1129198: Solve the system of equations:
Y=2x2+3
Y=x+2
Enter one point as (x,y)
Enter teo points as (x,y),(x,y)
Enter"no solution" as DNE.

Answer by ikleyn(52790) About Me  (Show Source):
You can put this solution on YOUR website!
.
y = 2x^2 + 3
y = x + 2


Left sides are identical - hence, right sides are equal:


2x^2 + 3 = x + 2  ====>

2x^2 -x + 1 = 0.


The discriminant = b^2 - 4ac = (-1)^2 - 4*2*1 = 1 - 8 = -7  ====>


There is no real solution. 


x%5B1%2C2%5D = %281+%2B-+sqrt%28-7%29%29%2F%282%2A2%29 = %281+%2B-+i%2Asqrt%287%29%29%2F4.


Answer.  This system HAS NO real solution/solutions.

         It has two distinct solution in complex numbers  (x,y) = (%281+%2B+i%2Asqrt%287%29%29%2F4,%281+%2B+i%2Asqrt%287%29%29%2F4+%2B2}  and  (x,y) = (%281+-+i%2Asqrt%287%29%29%2F4,%281+-+i%2Asqrt%287%29%29%2F4+%2B2).

Solved and explained.

You can simplify these complex number solutions,  if you need  (if you need to have them,  at all).