Question

if a-b =6 and a square + b square = 42, find the value of ab.

Answer 1

(a-b)² = a² + b²- 2ab

6² = 42 - 2ab

2ab = 42 - 36

ab = 6/2 = 3

Answer 2

3 a square plus b square ko   a - b ka square karke aur plus 2ab kar ke a -b ka man rakh denge