Hi, AB = 4-2,0+1, 3-1= 2,1,2AC = x-2,1+1, 1-1= x-2,2,0AD = 0,5,2Now if they are complaner then 212x-220052= 0 24-12x-4+25x-10=0 8-2x+4+10x-20=0 8x-8 = 0 x = 1Regards

pls answer 121

Hi, AB = (4 - 2, 0 + 1, 3 - 1) = (2, 1, 2) AC = (x - 2, 1 + 1, 1 - 1) = (x - 2, 2, 0) AD = (0, 5, 2) Now if they are complaner then |\begin{matrix} 2 & 1 & 2 \\ x - 2 & 2 & 0 \\ 0 & 5 & 2 \end{matrix}| = 0 2 (4) - 1 (2 x - 4) + 2 (5 x - 10) = 0 8 - 2 x + 4 + 10 x - 20 = 0 8 x - 8 = 0 x = 1 Regards

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