SOLUTION: Determine the zeros of the f(x)=x^2-3x-4 then estimate the instantaneous rate of change in f(x) at the zeros thanks so much

Question 1196945: Determine the zeros of the f(x)=x^2-3x-4 then estimate the instantaneous rate of change in f(x) at the zeros

thanks so much

Found 2 solutions by MathLover1, ikleyn:
Answer by MathLover1(20850)   (Show Source): You can put this solution on YOUR website!
to determine the zeros of the , set

...........factor

solutions:
if =>
if =>
so, zeros are and

the instantaneous rate of change in at the zeros:

∆y/∆x=
∆y/∆x=
∆y/∆x=
find and

then
∆y/∆x=

Answer by ikleyn(52788)   (Show Source): You can put this solution on YOUR website!
.
Determine the zeros of the f(x)=x^2-3x-4 then estimate the instantaneous rate of change in f(x) at the zeros
~~~~~~~~~~~~

Instantaneous rate of change of a function at a given point
is the value of the derivative of the function at this point.

Having this hint, complete the job on your own.

//////////////////

Keep in mind that estimations given in the post by MathLover1, are absolutely   .

Surely, the meaning of the term " estimate " is quite wide,
but making estimation in this way as MathLover1 does it ( obtaining the answer 0 (zero) ),
tells that she is not familiar with the meaning of this term and does not understand what she is doing / teaching . . .

                    God, save us from such tutors . . .

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