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i think it' =-8abc(a+b-c)

MrRoyal

The result of the product is a + 4b

The expression is given as:

  • \(-a +2b + 2c +2(a + b - c)\)

Open the brackets

\(-a +2b + 2c +2(a + b - c) = -a +2b + 2c +2a + 2b - 2c\)

Collect like terms

\(-a +2b + 2c +2(a + b - c) = -a +2a+2b + 2b + 2c - 2c\)

Evaluate the like terms

\(-a +2b + 2c +2(a + b - c) = a+4b\)

Hence, the result of the product is a + 4b

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