2012 · Q14
The sum of the squares of two numbers is 97 and the square of their difference is 25. The product of the two numbers is:
Elementary MathematicsAlgebra
- A45
- B36
- C54
- D63
Explanation
(a-b)^2 = a^2+b^2-2ab gives 25 = 97-2ab, so ab = 36.
The sum of the squares of two numbers is 97 and the square of their difference is 25. The product of the two numbers is:
Explanation
(a-b)^2 = a^2+b^2-2ab gives 25 = 97-2ab, so ab = 36.