Question

pllzzzz slove these I will mark first answer as brainlist answer......from chapter algebraic expressions and identities ​

Answer 1

Step-by-step explanation:

$(a + b + c)(a + b - c) \\ using \: id \: (a + b)(a - b) = {a}^{2} - {b}^{2} \\ (a + b) {}^{2} - c {}^{2} \\ {a}^{2} + {b}^{2} + 2ab - {c}^{2}$

hope you understood this.