The table below shows values of x and some values of y for the curve y = x3 + 2x2 - 3x – 4 f o r - 3 ≤ x ≤ 2.
(a) Complete the table by filling in the missing values of y, correct to 1 decimal place.
(b) On the grid provided, draw the graph of y = x3+ 2x2 - 3x - 4. Use the scale: 1 cm represents 0.5 units on x -axis. 1 cm represents 1 unit on y-axis.
(c) Use the graph to: (i) solve the equation x3 + 2x2 - 3x - 4 = 0;
(ii) estimate the coordinates of the turning points of the curve.
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