If one root of 2x2+kx-6=0 is 2. find the value of k and the other root.
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2
put the two value on x
then
2*2*2+k*2-6=0
8+2k-6=0
2=-2k
k=-1
then
2*2*2+k*2-6=0
8+2k-6=0
2=-2k
k=-1
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