The sum of two numbers is –11. The difference of the two numbers is –7. What is the product of the two numbers?

18

Step-by-step explanation:

According to the numbers the both numbers have to be negative

subtracting a negative will be the same as addition and so thats why the difference is bigger.

now its time for guess and check.

-6+-5

-11

but -6-(-5)=-1

so lets try

-9+(-2)=-11

-9-(-2)=-7

yay

so the product is

(-9)*(-2)=18

for any of you who need the translation here it is

step-by-step explanation:

find the angular size of the equatorial radius of the earth, if the horizontal parallax of the sun

(x+3)(x+7)

step-by-step explanation: