The sum of the real numbers x and y is 25. Their difference is 13. What is the value of xy ?

Guest Jun 15, 2022

#1**+1 **

You can make a system of linear equations, and then solve for x and y.

\({x-y=13}\)

\({x+y=25} \)

Next you can add these two equations together.

\({2x=38}\)

\({x=19} \)

Substituting in our first equation will then give us \({y=6}\)

Multiplying 19 and 6 together gives us **144**

YeetSkeet Jun 15, 2022

#1**+1 **

Best Answer

You can make a system of linear equations, and then solve for x and y.

\({x-y=13}\)

\({x+y=25} \)

Next you can add these two equations together.

\({2x=38}\)

\({x=19} \)

Substituting in our first equation will then give us \({y=6}\)

Multiplying 19 and 6 together gives us **144**

YeetSkeet Jun 15, 2022