square both sides w^2+7w-39=10w+1 minus (10w+1) both sides w^2-3w-40=0 factor what 2 numbers multiply to get -40 and add to get -3 -8 and 5 (w-8)(w+5)=0
set equal to 0
w-8=0 w=0
w+5=0 w=-5
we need to test in the original for extraneious solutions for x=-5, we get √-49=√-49 which is undefined since you can't do square roots of negatives
