A) \[2{{a}^{3}}+7{{a}^{2}}+6a-10\]
B) \[2{{a}^{3}}+7{{a}^{2}}+12a-10\]
C) \[2{{a}^{3}}-4{{a}^{2}}+12a-10\]
D) \[2{{a}^{3}}-4{{a}^{2}}+6a-10\]
Correct Answer: C
Solution :
\[({{a}^{3}}-2{{a}^{2}}+4a-5)-(-{{a}^{3}}-8a+2{{a}^{2}}+5)\] \[={{a}^{3}}-2{{a}^{2}}+4a-5+{{a}^{3}}+8a-2{{a}^{2}}-5\] \[=2{{a}^{3}}-4{{a}^{2}}+12a-10\]You need to login to perform this action.
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