What is the equation of the quadratic function represented by the graph?

Assessment: JAMB UTME - Mathematics - 1990 Subject: General Mathematics

Question 1 Report

What is the equation of the quadratic function represented by the graph?

Answer Details
The required equation is y = x2 - x - 2

i.e. B where the graph touches the graph touches the x-axis y = 0

x2 - x - 2 = 0 = (x + 1)(x - 2) = 0

Hence roots of the equation are -1 and 2 as shown in the graph

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