## anonymous one year ago Which of the following values "completes the square," or creates a perfect square trinomial, for x2 − 8x + ___? 8 16 –8 –16

1. anonymous

For x² + bx + c, the number that completes the square is $\left( \frac{ b }{ 2 } \right)^2$ for your problem that's$\left( \frac{ -8 }{ 2 } \right)^2$ for your problem that's

2. anonymous

so c is correct

3. anonymous

imeant b

4. anonymous

@peachpi

5. anonymous

yes 16

6. anonymous

7. anonymous

Using the completing-the-square method, find the vertex of the function f(x) = 2x2 − 8x + 6 and indicate whether it is a minimum or a maximum and at what point. Maximum at (2, –2) Minimum at (2, –2) Maximum at (2, 6) Minimum at (2, 6)

8. anonymous

is it a

9. anonymous

@peachpi

10. anonymous

can't be a maximum. It opens up because the number in front of x² is positve

11. anonymous

so c would be correctr

12. anonymous

@peachpi

13. anonymous

can't be a maximum

14. anonymous

so that only leave b :) @peachpi

15. anonymous

yes