anonymous one year ago What is the vertex and the equation of the axis of symmetry of the graph of y=x^2-6x-7?

1. Nnesha

formula to find x -coordinate of the vertex $\huge\rm x=\frac{ -b }{ 2a }$ then substitute all x for its value into the equation to find y-coordinate a=leading coefficient b= middle term

2. anonymous

so positive 6 over 2 times -1?

3. Nnesha

yes right !

4. Nnesha

wait -1 ?

5. Nnesha

it's 1x^2 so should be positive

6. anonymous

so (6/2(1))

7. Nnesha

right

8. Nnesha

so 6/2 =3 right ? now substitute x for 3 into the equation

9. ryanwhite499

Factor x2−6x−7 x2−6x−7 =(x+1)(x−7) Answer: (x+1)(x−7)