a-b = {-4; 3; 0} - {6; 0; -8} = {-4-6; 3-0; 0-(-8)} = {-10; 3; 8}
b+c = {6; 0; -8} + {0; -4; -3} = {6+0; 0-4; -8-3} = {6; -4; -11}
|a-b| = |{-10; 3; 8}| = sqrt((-10)^2 + 3^2 + 8^2) = sqrt(100 + 9 + 64) = sqrt(173)
3|a|+2|c| = 3sqrt((-4)^2 + 3^2 + 0^2) + 2sqrt(0^2 + (-4)^2 + (-3)^2) = 3sqrt(16 + 9) + 2sqrt(16 + 9) = 3sqrt(25) + 2sqrt(25) = 15 + 10 = 25
a-2b-4c = {-4; 3; 0} - 2{6; 0; -8} - 4{0; -4; -3} = {-4-26-0; 3-20-(-8); 0-2*(-8)-(-3)} = {-16; 3; 16}
a-b = {-4; 3; 0} - {6; 0; -8} = {-4-6; 3-0; 0-(-8)} = {-10; 3; 8}
b+c = {6; 0; -8} + {0; -4; -3} = {6+0; 0-4; -8-3} = {6; -4; -11}
|a-b| = |{-10; 3; 8}| = sqrt((-10)^2 + 3^2 + 8^2) = sqrt(100 + 9 + 64) = sqrt(173)
3|a|+2|c| = 3sqrt((-4)^2 + 3^2 + 0^2) + 2sqrt(0^2 + (-4)^2 + (-3)^2) = 3sqrt(16 + 9) + 2sqrt(16 + 9) = 3sqrt(25) + 2sqrt(25) = 15 + 10 = 25
a-2b-4c = {-4; 3; 0} - 2{6; 0; -8} - 4{0; -4; -3} = {-4-26-0; 3-20-(-8); 0-2*(-8)-(-3)} = {-16; 3; 16}