A) \[2{{x}^{3}}+2{{x}^{2}}+7x-8\]
B) \[-2{{x}^{5}}-7x+8\]
C) \[2{{x}^{3}}-2{{x}^{2}}-4x-8\]
D) All of these
E) None of these
Correct Answer: A
Solution :
Explanation Option [a] is correct. \[3{{x}^{3}}-{{x}^{2}}+\mathbf{2x}-\mathbf{4}-\left( {{x}^{3}}-3{{x}^{2}}-5x+4 \right)\] \[=3{{x}^{3}}-{{x}^{2}}+2x-4-{{x}^{3}}+3{{x}^{2}}+5x-4\] \[=2{{x}^{3}}+2{{x}^{2}}+7x-8.\]You need to login to perform this action.
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