Question

Madeline was completing the square and her work is shown below. Identify the line where she made her mistake.

f(x) = 3x^2 + 6x − 7
Line 1: f(x) = 3(x^2 + 2x) − 7
Line 2: f(x) = 3(x^2 + 2x + 1) − 7 − 1
Line 3: f(x) = 3(x + 1)^2 − 8

Line 1

Line 2

Line 3

She did not make any mistakes

Answer 1

whats ur guess

Answer 2

LiNE 3

Answer 3

good guess, but no

Answer 4

ok

Answer 5

Clearly there is nothing wrong in the Line1, she is just factoring out 3 form first two terms

Answer 6

Line 1: f(x) = 3(x^2 + 2x) − 7
Line 2: f(x) = 3(x^2 + 2x + 1) − 7 − 1

Answer 7

Line 2 then?

Answer 8

yes lol, if its not line1 and line3, then it has to be line2
u dont wana knw whats wrong wid line2 ?

Answer 9

Is it the -1 at the end?

Answer 10

yes, it has to be -3 instead

Answer 11

thanks

Answer 12

yw