The solutions of the equation $x^2 - x - 2 = 0$ are $x = -1$ and $x = 2$ - Junior Cycle Mathematics - Question 8(b) - 2018
Question 8(b)
The solutions of the equation $x^2 - x - 2 = 0$ are $x = -1$ and $x = 2$.
The table below shows three graphs, A, B, and C.
One of these is the graph of the function ... show full transcript
Worked Solution & Example Answer:The solutions of the equation $x^2 - x - 2 = 0$ are $x = -1$ and $x = 2$ - Junior Cycle Mathematics - Question 8(b) - 2018
Step 1
Justification:
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Answer
The correct answer is A.
Justification:
Graph A is the only one that crosses the y-axis at -2, corresponding to f(0)=−2.
Graph B does not cross at y=−2 and Graph C also fails to meet the condition as it incorrectly identifies the roots of the equation.
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