Question

2 numbers are first added together and then multiplied together. The numbers added together = 18 and the numbers multiplied together = 45. What are the 2 numbers? The numbers are 15 and 3

Answer 1

is this like a proof by chance?

Answer 2

if its not then i guess its just 15+ 3 = 18 and 15*3 = 45

Answer 3

You need to solve a equation system.
\[x+y=18\] and \[x \times y =45\]

Answer 4

\[x=18-y\] and put it in second equation: \[x \times y = 45; (18-y)y=45\]
\[y^2-18y+45=0\]
\[y _{1,2}=15;3\]
put it in first equation and find the x
\[x _{1,2}=18-y _{1,2}=3;15\]
Answer: x=3 when y=15 or x=15 when y=3