Question

I don’t know how to solve

Answer 1

`\bf v^2_f=v^2_o+2a(x_f-x_o)\implies \stackrel{subtracting~v^2_o~to~both~sides}{v^2_v-v^2_o=2a(x_f-x_o)} \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ ~\hfill \stackrel{dividing~both~sides~by~2(x_f-x_o)}{\cfrac{v^2_v-v^2_o}{2(x_f-x_o)}=a}~\hfill`