Tuesday, November 5, 2013

Solve the following equation: x(2i+3j+k).(i+j+x k)=6

Assuming x is a variable, and you want a dot product, then...
x%282%2A1%2B3%2A1%2B1%2Ax%29=6
x%28x%2B5%29=6
x%5E2%2B5x-6=0
%28x%2B6%29%28x-1%29=0

x=6 or x=1
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