Question

-x^2-7x+9 find the vertex

Answer 1

the x component of the vertex is the opposite of the middle number divided by 2

Answer 2

-(-7)/2 = 7/2; now use that to find the value of the function

Answer 3

-(7/2)^2 -7(7/2) +9 = ?

Answer 4

i get -27.75

Answer 5

so vertex = (\(\frac{7}{2},\frac{-111}{4}\)) maybe?

Answer 6

the correct answer was (7/2,85/4)

Answer 7

hmm ..... i must miss placed a negative someplace

Answer 8

here is another one -x^2-7x+7

Answer 9

-x^2-7x+9; Vx = 7/-2 if i see it right; you sure the correct answer doesnt start with -7/2?

Answer 10

oops the new problem is -x^2-x+7

Answer 11

-(x^2 +x -7) = y

x^2 +x -7 = -y

x^2 +x = -y+7

x^2 +x +(1/2)^2 = -y +7 +(1/2)^2

(x+1/2)^2 = -y +(29/4)

-(x+1/2)^2 = y - (29/4)

y = -(x+(1/2))^2 + (29/4)

vertex = (1/2, 29,4) maybe?

Answer 12

not correct

Answer 13

either you got a broken program; or someone broke the math today :)

Answer 14

correct answer was -1/2,29/4

Answer 15

thiiiissss close; its the negative in front that is throwing me off ... bummer

Answer 16

wolfram says my math was right; I just interpreted it wrong afterwards