Write a quadratic function f whose only zero is -1

This is different from the first one can someone me

The number of calories you burn depends on your weight. a 110-pound person burns 163 calories during 30 minutes of tennis. find the number of calories that a 190-pound person would burn during the same activity, assuming they burn calories at the same rate.

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)