Answer:
[tex] \huge \boxed{ \boxed{(a - {b)}^{2} } }[/tex]
Step-by-step explanation:
to understand this
you need to know about:
tips and formulas:
- algebraic identity:(a-b)²=(a+b)²-4ab
let's solve:
therefore
using the identity our answer is (a-b)²
let's prove it
- (a-b)²:a²-2ab+b²
- rewrite -2ab as 2ab-4ab:a²+b²+2ab-4ab
- use (a+b)²=a²+2ab+c²:(a+b)²-4ab
therefore
we have also proven that
