expand (a-b)^2 — step-by-step solution

Let's expand:

{(a - b)}^{2}

(a - b) \cdot (a - b)

a \cdot a

+ a \cdot - b

- b \cdot a

- b \cdot - b

ℹ

a \cdot a

a^{2}

‖

a \cdot - b

- a \cdot b

‖

- b \cdot - b

{(- b)}^{2}

a^{2}

- a b

- b a

+ {(- b)}^{2}

▷Answer: $a^{2} - 2 a b + b^{2}$