Question

if a-b =6and ab =16 find a square +b square

Answer 1

$( {a - b})^{2} = 36 \\ {a}^{2} + {b}^{2} - 2ab = 36 \\ 68$

Answer 2

A²+b²-ab=(a+b)²
A²+b²-6=16²
A²+b²=36+6
A²+b²=42

I hope answer is correct