## anonymous 4 years ago Which of the following is the vertex of the quadratic equation y = 6x2 + 24x + 16?

1. anonymous

Use the formula: -b/2a to find your axis of symmetry, sub that in, to find the y coordinate.

2. anonymous

was this originally a multiple choice question? Your question implies it is, but there are no follow up options.

3. anonymous

i got (2, 8)

4. apoorvk

vertex of a quadratic equation' parabola = (-b/2a , -D/4a) where, D = Discriminant. $D= \sqrt{b^2 - 4ac}$

5. anonymous

(–2, –8) (–2, 8) (2, –8) (2, 8)

6. anonymous

these are the options

7. anonymous

Try again

8. apoorvk

Err.. a wee bit of a mistake. should be (-2, -8)

9. anonymous

can you work it out please? I don't understand

10. anonymous

|dw:1334421718973:dw|

11. anonymous

That gives you your axis of symmetry

12. anonymous

|dw:1334421758630:dw|

13. anonymous

(–2, –8) is the ans y=6(x^2+4x+4)-8 (y+8)=6(x+3)^2 therefore –2, –8) is the ans