A) \[4{{x}^{2}}+x\]
B) \[7x+2{{x}^{2}}-4{{y}^{2}}\]
C) \[7x+4{{x}^{2}}-4{{y}^{2}}\]
D) \[x+2{{x}^{2}}\]
Correct Answer: B
Solution :
sum \[=3{{x}^{2}}+4x-2{{y}^{2}}-{{x}^{2}}+3x-2{{y}^{2}}\] \[=2{{x}^{2}}+7x-4{{y}^{2}}\]
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