S = VT + 1 / 2at ^ 2 VT ^ 2-v0 ^ 2 = 2As how can these two formulas be derived Ask for guidance

S = VT + 1 / 2at ^ 2 VT ^ 2-v0 ^ 2 = 2As how can these two formulas be derived Ask for guidance

∵v=v0+at
∴S = (v0+v)/2*t
= (v0+v0+at)/2*t
= (2v0+at)/2*t
= v0t+1/2at^2
∵v=v0+at
∴t=(v-v0)/a
∴S = (v0+v)/2*t
= (v0+v)/2*(v-v0)/a
= (v+v0)(v-v0)/(2a)
= (v^2-v0^2)/(2a)
∴v^2-v0^2 = 2aS