The product of two numbers is -30, but their sum is -13. What are these two numbers?

Answer 1

xy =-30

x+y= -13

x=-13-y

(-13-y)y=30

-13y-y^2 =30

-y^2 -13y -30 =0

y^2 +13y +30 =0

(y+10)(y+3) =0

y=-10 or -3

x=-3 or -10

the two numers are -3 and -10