part B

[wet current]

'

for B, you differentiate to get 2 - 2x. why dont you equal it to 0 after but instead plug in 0?

[keen shell]

setting it equal to zero will find the stationary point of the quadratic, however you want to find the gradient where x=0

[wet current]

oh

so if i equal it to 0

i'd be finding like the max?

[keen shell]

in this case yeah

[wet current]

and finding gradient, just plug x = 0

cool thanks

[keen shell]

yeah bc you want the gradient at P and the coord of P is where x=0

[wet current]

if P was at like

(2,4)

plug 2?