1.

Factorization: \[\mathbf{10}+\mathbf{3x}-{{\mathbf{x}}^{\mathbf{2}}}\]

A.  \[\left( 2+x \right)\left( 5-x \right)\] 
B.  \[\left( 2+x \right)\left( 5+x \right)\]
C.  \[\left( 2+x \right)\left( 3-x \right)\]           
D.  \[\left( 2+3x \right)\left( 2-x \right)\]
Answer» B.  \[\left( 2+x \right)\left( 5+x \right)\]


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