Write the coefficients of \(x^2\) in each of the following :
i)\(2 + x^2 + x\)
ii)\(2 - x^2 + x^3\)
iii)\(\frac{\pi{x^2}}{2} + x\)
iv)\(\sqrt{2}x - 1\)

i) The coefficient of \(x^2\) in \(2 + x^2 + x\) is \(1\).


ii) The coefficient of \(x^2\) in \(2 - x^2 + x^3\) is \(-1\).


iii) The coefficient of \(x^2\) in \(\frac{\pi{x^2}}{2} + x\) is \(\frac{\pi }{2} \).


iv) The coefficient of \(x^2\) in \(\sqrt{2}x - 1\) is \(0\).