question_answer 1)

What should be the value of  if the value of \[2{{x}^{2}}+x-a\] equals to 5, when \[x=0?\]

Answer:

                \[2{{x}^{2}}+x-a=2{{(0)}^{2}}+(0)-a\]      \[\left| \text{when }x=0 \right.\]                 \[=-a\]                 According to the question,                 \[-a=5\] \[\Rightarrow \]               \[a=-5\].