(i)[3]
Find the equation that represents the curve.
(ii)[2]
Write $7 - x^2 - 6x$ in the form $a - (x + b)^2$, where $a$ and $b$ are constants.
(iii)[3]
Find the values of $x$ for which the gradient of the curve is positive.
(c(ii))[2]
Write $7 - x^2 - 6x$ in the form $a - (x + b)^2$, where $a$ and $b$ are constants.
(c(iii))[3]
Find the values of $x$ for which the gradient of the curve is positive.