Answer:
a^2 -2ab + b^2
Step-by-step explanation:
(−a+b)(b–a)
FOIL
first : -a*b = -ab
outer: -a * -a = a^2
inner +b * +b = b^2
last: b* -a = -ab
Add them together
-ab+a^2 + b^2 -ab
Combine like terms
a^2 -2ab + b^2
Answer:
a^2+b^2-2ab
Step-by-step explanation:
(-a+b)(b-a)=
first mutiply -a(b-a)=-ab+a^2
second multiply b(b-a)=b^2-ab
then add : -ab+a^2+b^2-ab= a^2+b^2-2ab
