In Heather's physics class, she had to solve the equation 7=1/2at^2+ut

Question

for u
.

Which equation correctly solves for u
?

CLEAR CHECK

u=14 − at^2/t

u=7−1/2at^2−t

u=7 − 1/2at^2/t

u=14−at^2−2t

Answer 1

None of the provided equations correctly solve for u in the given equation.