(adsbygoogle = window.adsbygoogle || []).push({}); Straight line! help!!!

1. The problem statement, all variables and given/known data

the straight line 3y-x-k=0 is the normal to the curve y=4x^{3}+12x^{2}+9x-1 at pointA. The curve has two turning points.

a)find the coordinates ofA

b)find the coordinates of the turning points of the curve. then, determine whether the turning points are a maximum or a minimum point.

2. Relevant equations

so can we use simultaneous equation on this question?

or maybe replace y in the equation

3. The attempt at a solution

please help!!!

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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# Straight line! help

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