Given a + B = 7, ab = 5, find the value of (a-b) square

Given a + B = 7, ab = 5, find the value of (a-b) square

a+b=7
Square on both sides
a²+2ab+b²=49
So a & # 178; + B & # 178;
=49-2ab
=49-10
=39
So (a-b) &;
=a²-2ab+b²
=39-10
=29