A) \[{{x}^{2}}-3x-70\]
B) \[-{{x}^{2}}+4x+28\]
C) \[{{x}^{2}}-4x+28\]
D) \[-{{x}^{2}}+3x+28\]
Correct Answer: A
Solution :
\[\left( x+7 \right)\left( x-10 \right)\] \[\Rightarrow {{x}^{2}}+7x-10x-70\Rightarrow {{x}^{2}}-3x-70\]
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