1.

\[(\mathbf{x}+\mathbf{a})(\mathbf{x}-\mathbf{b})\]is given by

A.  \[{{x}^{2}}-\left( a+b \right)x+ab\] 
B.  \[{{x}^{2}}-\left( a-b \right)x+ab\]
C.  \[{{x}^{2}}-\left( a-b \right)x+ab\]                       
D.  \[~{{x}^{2}}+\left( a-b \right)x-ab\]
Answer» E.


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