1.

If \[\left( \mathbf{3a}+\mathbf{4b} \right)=\mathbf{16}\] and \[\mathbf{ab}=\mathbf{4}.\]Find the value of \[\left( \mathbf{9}{{\mathbf{a}}^{\mathbf{2}}}+\mathbf{16}{{\mathbf{b}}^{\mathbf{2}}} \right)\]

A.  160  
B.  100   
C.  120  
D.  140
Answer» B.  100   


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