SOLUTION: Find all the values of x (if any) where the tangent line to the graph of the given equation is horizontal. y = 4x^2 + 13x + 13 A. 6.5 B. -1.63 C. 0 D. 6.5 E. 1.63

Question 1118965: Find all the values of x (if any) where the tangent line to the graph of the given equation is horizontal.
y = 4x^2 + 13x + 13
A. 6.5
B. -1.63
C. 0
D. 6.5
E. 1.63
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
Is this for Algebra 2, or for Calculus 1?

Solve for x.
Answer by ikleyn(52781) (Show Source): You can put this solution on YOUR website!
.
Exactly at the vertex of the parabola: x = = = -1.625.

Option B in your list.

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