SOLUTION: what is the vertex and line of semmetry of f(x)=-3(x+2)^2 graph the function thanks in advance solve for x 4x^2=-9x-2 solve by completing the square x^2 + 13/2x =13

Question 320057: what is the vertex and line of semmetry of f(x)=-3(x+2)^2
graph the function
thanks in advance

solve for x
4x^2=-9x-2
solve by completing the square
x^2 + 13/2x =13
the width of a rectangle is 2ft less . the area is 15ft^2. find the lenghth and width...
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
The equation is already in vertex form, , where (h,k) is the vertex.
Comparing

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(h,k)=(-2,0).
The axis of symmetry includes the vertex.

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and
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For a rectangle,

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Substitute,

Only the positive solution makes sense in this problem,

Then,

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