Implicit differentiation:
I understand that you would need to use it for cases where the question is to differentiate y=x^x
But how do i know when to use it? Could you see the picture i attached below, implicit differentiation was used, however, i could have made it the subject and gone about differentiating it explicitly..

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When i did this question, i made r the subject by taking the square root of the left side

When to use it? Hmm

You use it when isolating y is more work than it's worth,
sometimes it's even impossible

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