# Algebra

X+y=5, find xy (find the product of x and y if x+y = 5)

Result

f = (Correct answer is: 5x-x^2)

#### Solution:

$f = xy \ \\ f = x(5-x) \ \\ f = y (5-y) \ \\ f = 5x-x^2$

Our examples were largely sent or created by pupils and students themselves. Therefore, we would be pleased if you could send us any errors you found, spelling mistakes, or rephasing the example. Thank you!

Leave us a comment of this math problem and its solution (i.e. if it is still somewhat unclear...):

Be the first to comment!

Tips to related online calculators

## Next similar math problems:

1. Expression with powers
If x-1/x=5, find the value of x4+1/x4
2. Evaluation of expressions
If a2-3a+1=0, find (i)a2+1/a2 (ii) a3+1/a3
3. Equation 23
Find value of unknown x in equation: x+3/x+1=5 (problem finding x)
Find the roots of the quadratic equation: 3x2-4x + (-4) = 0.
5. The product
The product of a number plus that number and its inverse is two and one-half. What is the inverse of this number
6. Product
The product of two consecutive odd numbers is 8463. What are this numbers?
7. Square root 2
If the square root of 3m2 +22 and -x = 0, and x=7, what is m?
8. Expressions 3
If k(x+6)= 4x2 + 20, what is k(10)=?
9. Equation
Equation ? has one root x1 = 8. Determine the coefficient b and the second root x2.
10. Roots
Determine the quadratic equation absolute coefficient q, that the equation has a real double root and the root x calculate: ?
11. Discriminant
Determine the discriminant of the equation: ?