my question is
(3a+2b-7c)square
now i have to expand it but cant understand how to do it
Answers
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Answer
9a^2 + 4b^2 + 48c^2+ 2(6ab - 14bc - 21ca)
Step-by-step explanation:
(a + b + c)^2 = a^2 + b^2 + c^2 +2(ab + bc + ca)
=> (3a+2b-7c)square = 9a^2 + 4b^2 + 48c^2+ 2(6ab - 14bc - 21ca)
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