differentiation with quadratics

[celest flume]

This is probably easy but my brain doesn’t want to cooperate with the question. I am looking at 2a

<@&791435371564892232> idk if I’m meant to use this

[nocturne wedge]

What’s up

[celest flume]

I don’t understand the question properly

Since it’s a quadratic do I differentiate as normal?

[nocturne wedge]

Yeah

[celest flume]

Then substitute x

[nocturne wedge]

It’s still bring the power to the front and reduce by one

[celest flume]

The answer is supposed to be -5 but I’m getting a positive number

[nocturne wedge]

And yeah sub in x

What did you differentiate to?

[celest flume]

I got -8x+11

[nocturne wedge]

Yeah

[celest flume]

Then subbed in the 2

[nocturne wedge]

So sub in 2

That is -5

[celest flume]

Wait

Omg

I think my brain is messed up

Thank you for helping me

[nocturne wedge]

Np

[celest flume]

I thought u had to sub y in later and kept getting the wrong answer

[nocturne wedge]

Lmao no

[celest flume]

Can I ask one more question pls before u go

[nocturne wedge]

Yeah ofc

[celest flume]

When do u know when to differentiate by x^n and when to differentiate by using quadratics

Wait nvm

I think I answered my one question

Sorry to disturb u again

[nocturne wedge]

Yeah I think you did

All of yr 12 differentiation is the same

Bring the power to the front and reduce by one

And same with integration, it’s all the same
Increase the power by one and divide by the new power

[celest flume]

Wait I have one more question, was I meant to use the maths mentor ping

[nocturne wedge]

You can keep it in this chain or if you’ve already posted it just tag me

[celest flume]

Ok thanks so much