Question

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

Answer 1

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

Answer 2

so c is correct

Answer 3

imeant b

Answer 4

@peachpi

Answer 5

yes 16

Answer 6

can you answer another one

Answer 7

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)

Answer 8

is it a

Answer 9

@peachpi

Answer 10

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

Answer 11

so c would be correctr

Answer 12

@peachpi

Answer 13

can't be a maximum

Answer 14

so that only leave b :) @peachpi

Answer 15

yes