Question

simplify (a+b+c)(a+b-c)​

Answer 1

Step-by-step explanation:

$= > (a + b + c)(a + b - c) \\ = > (x + y)(x - y) \: \: \: take \: (a + b) = a \: and \: \: c = y \\ = > {x}^{2} - {y}^{2} \\ = > {(a + b)}^{2} - {c}^{2} \\ = > {a}^{2} + 2ab + {b}^{2} - {c}^{2} \\ = > {a}^{2} + {b}^{2} - {c}^{2} + 2ab$