C4 integration

I need help with f. I don't know what I'm doing wrong. All help appreciated, x. IMG_20180923_082244-compressed.jpg.jpeg

What is u? sqrt x?
Also, whatever the u is, you cannot factor the u out of an integral (third line)

U can only take the 2 as a coefficient of the integral. Not 2U, because U isn't a constant

Original post by Arctic Kitten

What is u? sqrt x?
Also, whatever the u is, you cannot factor the u out of an integral (third line)

Yes, u = sqrt x.
And thanks, I didn't know that u couldn't be factored out😊.

Never mind, I got it😊

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