Question

expand each of the following: (5a-4b-3c)²​

Answer 1

Step-by-step explanation:

plz go through the attached photo

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Answer 2

Answer:

put the formula a²+b²+c²-2ab+2bc-2ca

Step-by-step explanation:

5a²+4b²+3c²-2*5a*4b+2*4b*3c-2*3c*5a

25a²+14b²+9c²-40ab+24bc-30ca