Differentiation question

[maths12345]

Hi, i have linked a question and its answer below. Wouldn't the value for dy/dx be -4+4x ?
If not, could someone please explain.


Thank you for your help.

 

[Deleted member 4993]

Hi, i have linked a question and its answer below. Wouldn't the value for dy/dx be -4+4x ? If not, could someone please explain.Thank you for your help.

You are correct.

 

[firemath]

Did you graph the parabola?

 

[Dr.Peterson]

They have a typo on line 2, putting "=" for "+". Then everything went bad from there.

Proofreading is really important in math!

 

[Steven G]

You are correct.


View attachment 15915
View attachment 15914

Go directly to the corner for that missed error.

 

[Deleted member 4993]

Go directly to the corner for that missed error.

OP said:

"Hi, i have linked a question and its answer below. Wouldn't the value for dy/dx be -4+4x "

When I said "You are correct" -"You" was referring to the student.

 

[Steven G]

OP said:

"Hi, i have linked a question and its answer below. Wouldn't the value for dy/dx be -4+4x "

When I said "You are correct" -"You" was referring to the student.

Go to the corner anyways.

 

[Dr.Peterson]

I take it you just want company ...