If \[{{x}^{2}}+ax+10=0\] and \[{{x}^{2}}+bx-10=0\] have a common root, then \[{{a}^{2}}-{{b}^{2}}\] is equal to [Kerala (Engg.) 2002]

If \[{{x}^{2}}+ax+10=0\] and \[{{x}^{2}}+bx-10=0\] have a common root,

1.	If \[{{x}^{2}}+ax+10=0\] and \[{{x}^{2}}+bx-10=0\] have a common root, then \[{{a}^{2}}-{{b}^{2}}\] is equal to [Kerala (Engg.) 2002]
A.	10
B.	20
C.	30
D.	40
Answer» E.

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If \[{{x}^{2}}+ax+10=0\] and \[{{x}^{2}}+bx-10=0\] have a common root, then \[{{a}^{2}}-{{b}^{2}}\] is equal to [Kerala (Engg.) 2002]

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