a-b = 6 & a²+b²= 42 then find the value of ab
Answers
Answered by
2
Step-by-step explanation:
using identity a² + b² - 2ab = (a - b)²
a - b = 6 a² + b² = 42
(a - b)² = 6² = 36
substitute in the identity
42 - 2ab = 36
- 2ab = 36 - 42
- 2ab = - 6
ab = -6/-2
ab = 3
Hope you get your answer
Similar questions