To find the answer to "What two numbers have a product of 15 and a sum of 167?" we first state what we know. We are looking for x and y and we know that x • y = 15 and x + y = 167.
Before we keep going, it is important to know that x • y is the same as y • x and x + y is the same as y + x. The two variables are interchangeable. Which means that when we create one equation to solve the problem, we will have two answers.
To solve the problem, we take x + y = 167 and solve it for y to get y = 167 - x. Then, we replace y in x • y = 15 with 167 - x to get this:
x • (167 - x) = 15
Like we said above, the x and y are interchangeable, therefore the x in the equation above could also be y. The bottom line is that when we solved the equation we got two answers which are the two numbers that have a product of 15 and a sum of 167. The numbers are:
0.08987
166.91013
That's it! The two numbers that have a product of 15 and a sum of 167 are 0.08987 and 166.91013 as proven below:
0.08987 • 166.91013 ≈ 15
0.08987 + 166.91013 = 167
Note: Answers are rounded up to the nearest five decimals if necessary so the answers may not be exact.
Product Sum Calculator
Need the answer to a similar problem? Submit another product and sum below to find the two numbers that make your product and sum.