(1) Draw the graph of y = x2 and y = 2x + 3 and hence solve the equation x2 β 2x β 3 = 0.
(2) Draw the graph of y = 2x2 and y = 3 β x and hence solve the equation 2x2 + x β 3 = 0.
(3) Draw the graph of y = 2x2 and y = 3 + x and hence solve the equation 2x2 β x β 3 = 0.