Question

Factorise it


$a {}^{2} - (b - c) {}^{2}$
​

Answer 1

Explanation:

see in the attachment above

Answer 2

it's in the form of

${a}^{2} - {b}^{2}$

that is equal to

$(a - b)(a + b)$

therefore

${a}^{2} - {(b - c)}^{2} = (a - b + c)(a + b - c)$