Question

f(x) = 2x2 − 8x + 5
Line 1: f(x) = 2(x2 − 8x) + 5
Line 2: f(x) = 2(x2 − 8x + 16) + 5 − 32
Line 3: f(x) = 2(x − 4)2 − 27

Line 1

Line 2

Line 3

He did not make any mistakes

Answer 1

Would you please include the instructions that came with this problem?

Note that since your "Line 2" includes x^2, it's not a line; it's a curve (a quadratic).

Answer 2

Marvin was completing the square and his work is shown below. Identify the line where he made his mistake.

Answer 3

ahha that's better

Answer 4

f(x) = 2(x2 − 8x) + 5

Answer 5

must say

f(x) = 2(x2 − 4x + 4) + 5 - 8

Answer 6

the above is for line 1

Answer 7

so its line 1?

Answer 8

definitely

Answer 9

the answer is line 1?

Answer 10

Line 1 shows an improper (wrong) factoring of the given equation.

Answer 11

For the additional practice, why don't you factor the given equation properly for a "complete the square" problem?