If \[{{x}^{2}}+7ax+40=0\] and \[{{x}^{2}}+2ax-60=0\] have a common root, then the value of a is

If \[{{x}^{2}}+7ax+40=0\] and \[{{x}^{2}}+2ax-60=0\] have a common roo

1.	If \[{{x}^{2}}+7ax+40=0\] and \[{{x}^{2}}+2ax-60=0\] have a common root, then the value of a is
A.	± 1
B.	± 2
C.	± 3
D.	± 4
Answer» C. ± 3

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If \[{{x}^{2}}+7ax+40=0\] and \[{{x}^{2}}+2ax-60=0\] have a common root, then the value of a is

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