Question

Сумма двух чисел равна 8 их разность равна 12.найдите их произведение

Answer 1

{х+у=8
{x-y=12

{x=8-y
{x-y=12

8-y-y=12
y=-2

x=8-(-2)
x=10

Тогда мы можем найти произведение этих чисел:

10×(-2)=-20

Answer 2

Let's call the two numbers "x" and "y". According to the given information:

1. The sum of the two numbers is 8: x + y = 8

2. The difference between the two numbers is 12: x - y = 12

To find the product of these two numbers, let's solve for "x" and "y" first. We can do this by solving the system of equations:

1. x + y = 8
2. x - y = 12

Let's add both equations to eliminate "y":

(x + y) + (x - y) = 8 + 12

Simplifying:

2x = 20

Now, divide both sides by 2 to find the value of "x":

x = 20 / 2 x = 10

Now that we have the value of "x", we can find the value of "y" by substituting it back into one of the equations. Let's use the first equation:

x + y = 8 10 + y = 8

Subtract 10 from both sides to find "y":

y = 8 - 10 y = -2

So the two numbers are 10 and -2.

Now, to find their product, simply multiply them together:

Product = x * y Product = 10 * -2 Product = -20

The product of the two numbers is -20.