Question 193963
tsqrt(3t^2) -3sqrt7 -t^2sqrt3-sqrt(49t^2) +3sqrt7,,,but  sqrt (3t^2) =sqrt(3)sqrt(t^2) =t*sqrt3
t^2sqrt3 -3sqrt7 -t^2sqrt3 -sqrt(49t^2) +3sqrt7
cancel  like  terms
-sqrt (49t^2)
-7t,,,,,,,,,,,,answer