SOLUTION: Given F(x)=x^2+2x-8 , Solve F(x) Using each method below: Show work please.
1). Solve by graphing.
2). Solve for factoring.
3). Solve by the quadratic formula
Thanks
Algebra.Com
Question 1014422: Given F(x)=x^2+2x-8 , Solve F(x) Using each method below: Show work please.
1). Solve by graphing.
2). Solve for factoring.
3). Solve by the quadratic formula
Thanks!
Found 2 solutions by Boreal, stanbon:
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
x^2+2x-8=0
Factors into (x+4)(x-2)=0; x=-4, 2
=========
quadratic
x=(1/2)(-2 +/- sqrt (4+32)=
(1/2) (-2+/-6)=(1/2)(-8) and (1/2)(4)=-4,2
=========
graph
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Given F(x)=x^2+2x-8 , Solve F(x) Using each method below: Show work please.
1). Solve by graphing.
--------------------------------------------
2). Solve by factoring.
(x+4)(x-2) = 0
x = -4 or x = 2
-----------------------------------------------
3). Solve by the quadratic formula
x = [-2 +- sqrt(2^2-4*1*-8)]/2
x = [-2 +- sqrt(36)]/2
x = [-2+-6]/2
x = -4 or x = 2
--------------------------------
Cheers,
Stan H.
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