Question

Guys I just want explanation.(vi) 2a + 3b - 4c and a - b -c.Find the product of . The correct answer is (2a2 + ab - 6ac - 3b2 + bc + 4c2)​

Answer 1

Answer:

2a^2+ab-6ac-3b^2+bc+4c^2

Step-by-step explanation:

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Answer 2

Answer:

2a^2-3b^2-ab-6ac+4c^2+bc

Step-by-step explanation:

Distribute:

= 2a(a - b -c) + 3b(a - b -c) - 4c(a - b -c)

Remove the brackets:

= 2a^2-2ab-2ac-3b^2+3ab-3bc-4ca+4cb+4c^2

Combine like terms:

= 2a^2-3b^2-2ab+3ab-2ac-4ac+4cb-3bc+4c^2

= 2a^2-3b^2-ab-6ac+4c^2+bc

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