Question

Which of the following is the correct expansion of the given identity?
$(a-b{)}^2$

• A. $a^2-2ab+b^2$
• B. $a^2-2ab-b^2$
• C. $a^2+2ab+b^2$
• D. $a^2+2ab-b^2$

Answer 1

The correct option is A $a^2-2ab+b^2$

The expansion of the identity,
$(a-b{)}^2=a^2-2ab+b^2$