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# 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 $$0$$.