1.

(4a+3b+2c)2_x005F_x000D_

A. 16a^{2}-9b^{2}+4c^{2}-24ab+12bc-16ca
B. 16a^{2}+9b^{2}+4c^{2}+24ab+12bc+16ca
C. 4a^{2}+3b^{2}+2c^{2}+24ab+12bc+16ca
D. 16a^{2}+9b^{2}+4c^{2}-24ab-12bc-16ca
Answer» C. 4a^{2}+3b^{2}+2c^{2}+24ab+12bc+16ca


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