SOLUTION: use quadractic equation to find the x intercept if any. then evaluate the function for several values of x. f(x)=-x^2-2x-1

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: use quadractic equation to find the x intercept if any. then evaluate the function for several values of x. f(x)=-x^2-2x-1      Log On


   

Question 236220: use quadractic equation to find the x intercept if any. then evaluate the function for several values of x. f(x)=-x^2-2x-1
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
f(x)=-x^2-2x-1
+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+10%2C+-x%5E2+-2x+-1%29+ (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, -x^2 -2x -1).
The x intercept=-1 & there are no other x intercepts.
y=-x^2-2x-1
Let x=2
y=-2^2-2*2-1
y=-4-4-1
y=-9 or (2,-9)
Let x=-4
y=-4^2-2*-4-1
y=-16+8-1
y=-9 or (-4,-9)