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Question: Find the x-intercepts by graphing the related function of the equation x2 + 3x - 4 = 0.


A ) - 4 and 3
B ) 4 and 3
C ) - 6 and 1
D ) - 4 and 1

Steps to derive

1 ax2 + bx + c = 0
 [Standard form of a quadratic equation.]

2 x2 + 3x - 4 = 0.
 [Original equation.]

3 Sketch the graph of the related quadratic function y = x2 + 3x - 4 as:


4 In the graph, the x-intercepts are - 4 and 1.



Hence the right answer is Option D

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