Watching an exam solutions video on stationary points, and he substitutes x= -2 into y=12x^5 + 5x^6 + 1, which gives him -63 as the value for y.
When I do this is situation though, I get an answer nothing like -63.
I was doing 12(-2^5) + 5(-2^6) + 1, which didn't give me -63. I also tried (12*-2)^5 + (5*2)^6 + 1, which again, didn't give me -63.
Can someone please walk me through how you get y=-63 for the answer of that equation when you substitute x=-2?
Would be a real relief it's been stressing me out all day, I have a test on differentiation and coordinate geometry tomorrow and this was on an exam solutions video on finding stationary points and the nature of them
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