Trig

Use a graphical method to find a solution to the following system of equations in the interval –1 ≤ x ≤ 5:

y = x2 – 4x + 2
y = x + 2
The solution set to this system of equations in the interval –1 ≤ x ≤ 5 is

{}
{(2, 0)}
{(0, 2), (5, 7)}
{(2, 0), (7, 5)}

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asked by Kiki
  1. Why are you calling this trig ?

    x^2 - 4x + 2 = x+2
    x^2 - 5x = 0
    x(x-5) = 0
    x = 0 or x = 5

    sub in those x's in either of the two equations to find the y, then choose your answer.

    http://www.wolframalpha.com/input/?i=plot+y+%3D+x%5E2+–+4x+%2B+2%2C++y+%3D+x+%2B+2

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    posted by Reiny
  2. I got choice 3 is that correct

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    posted by Kiki
  3. of course

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    posted by Reiny

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