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  • 07-08-2020
  • Mathematics
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Simplify (a + b - c)(a + b + c)

Respuesta :

CoalitionStorm
CoalitionStorm CoalitionStorm
  • 07-08-2020

Answer:

a^2 + b^2 - c^2 + 2ab

Step-by-step explanation:

(a + b - c)(a + b + c)

1. expand

(a^2 + ab + ac + ba + b^2 + bc - ca - cb - c^2)

2. rearrange,

(a^2 + b^2 - c^2 + ab + ba + ac - ca + bc - bc)

3. add and subtract

(a^2 + b^2 - c^2 + 2ab)

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