Question

( a+b+c) (a+b-c) please slove

Answer 1

Answer:

Step-by-step explanation:

Answer 2

$(a + b + c)(a + b - c) \\ \\ = a {}^{2} + ab - ac + b a + b {}^{2} - bc \\ + ca + cb - c {}^{2} \\ \\ = a {}^{2} + 2ab + b {}^{2} - c {}^{2}$


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