Question

A+b=16 a² +b² =124. Ab=

Answer 1

Solution:

Given a+b=16 ---(1)

a²+b²=124 ----(2)

we know the algebraic identity:

a²+b²+2ab = (a+b)²

=> 124+2ab= 16²

=> 124 + 2ab = 256

=> 2ab = 256 - 124

=> 2ab = 132

=> ab = 132/2

=> ab = 66

Therefore,

ab = 66