Question

fastly answer pls
if a-b=3 and a²+b²=29 find (ab)
a)10
b)15
c)29/3
d)18​

Answer 1

Answer:

Ans: (a) 10

Step-by-step explanation:

Given a-b=3

Squaring on both sides,

(a-b)² = 3²

a² + b² - 2ab = 9

(a² + b²)  - 2ab = 9

29 - 2(ab) = 9

     -2(ab) = 9 - 29

     -2(ab) = -20

         (ab) = -20/-2

         (ab) = 10

Ans: (a)