The values of k for which the equations \[{{x}^{2}}-kx-21=0\] and \[{{x}^{2}}-3kx+35=0\] will have a common roots are:

The values of k for which the equations \[{{x}^{2}}-kx-21=0\] and \[{{

1.	The values of k for which the equations \[{{x}^{2}}-kx-21=0\] and \[{{x}^{2}}-3kx+35=0\] will have a common roots are:
A.	\[k=\pm 4\]
B.	\[k=\pm 1\]
C.	\[k=\pm 3\]
D.	\[k=0\]
Answer» B. \[k=\pm 1\]

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The values of k for which the equations \[{{x}^{2}}-kx-21=0\] and \[{{x}^{2}}-3kx+35=0\] will have a common roots are:

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