求各位G友帮忙解答两道数学题！

yinjiezeng

1.By what amount does the sum of the roots exceed the products of the roots of the equation (x-5)(x+2)=0?



2.The right table summarizes the results of an election poll in which 4000 voters participated. In the actual election, all 4000of these people voted and those people who chose a candidate in the poll voted for that candidate. People who were undecided voted for candidate A in the same proportion as the people who cast votes for candidates in the poll. Of the people polled, how many voted for candidate A in the actual election?
A.1420      B.1500     C.1640       D.1680       E.1800

yinjiezeng

石沉大海了吗，为什么没有回复我呢