Question

(3a +7b-c)²
Whole method​

Answer 1

answer of your question

Answer 2

Answer:

(3a+7b$-c)^{2}$= $(3a)^{2}$+$(7b)^{2}$+$-c^{2}$+2[3a][7b]+2[7b][-c]+2[-c][3a]

9$a^{2}$+49$b^{2}$+$c^{2}$+42ab-14bc-6ac

Step-by-step explanation: