Find the vertex, the line of symmetry, the maximum or minimum value of the quadratic function, and graph of function for f(x)=-x^2+12x+3

Question

Find the vertex, the line of symmetry, the maximum or minimum value of the quadratic function, and graph  of function for f(x)=-x^2+12x+3

saifoo.khan · Answer

C'mon not the whole HW!

saifoo.khan · Answer

V = (6, 39)

Line, x = 6

Max @ 39

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campbell_st · Answer

remember the general quadratic formula     then  x =  -b/2a   will give the line of symmetry.   Substitute this value into the original equation to get the max or min.  The coefficent of x^2 determines concavity, positive concave up, negative concave down.  

Last set is to find the roots by solving for x 

so let$$-x^2 +12x + 3 = 0  $$

looks like you'll need the GQF to find x or where the curve cuts the x axis