Quadratic equations ) Find the roots of the following quadratic, expressed as decimals: 2.5 x^{2}-6 x+3=0 b) State whether the gradient of the curve described by this equation in part

(a) is positive, negative or zero at each of the following points: (i)x = 0 (ii)x = 1.2 (iii) x = 1.69 (iv) x = 1.75 (c) Rearrange the following equation into the form used in part (a) of thisquestion: x=\frac{0.5 \pm \sqrt{0.25-1}}{0.5}