# math 213

posted by
**christy**
.

Kahlil said that using the equation

he can find a similar equation for

Examine his argument. If it is correct, supply any missing

steps or justifications; if it is incorrect, point out why.

= a2 - 2ab + b2

= a2 + 2a1-b2 + 1-b22

1a - b22 = 3a + 1-b242

2ab + b2, 1a - b22.

1a + b22 = a2 +