The difference of 2 numbers is 4 and their sum is -7 what is their product

Question

It is a hard question for me

Answer 1

call the numbers x and y

x-y=4

x+y=-7

add the two equations

2x=-3

x=-3/2=-1.5

-1.5+y=-7

y=-7+1.5

y=-5.5

the two numbers are -1.5 and -5.5

the product is (-1.5)(-5.5)=8.25