a. By sketching graphs of y = x 3 + 5x 2 and y = 5
Question:
a. By sketching graphs of y = x3 + 5x2 and y = 5 − 2x, determine the number of real roots of the equation x3 + 5x2 + 2x − 5 = 0.
b. Verify by calculation that the largest root of x3 + 5x2 + 2x − 5 = 0 lies between x = 0 and x = 2.
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Step by Step Answer:
a First sketch the graphs of y x3 5x2 and y 5 2x on the same set of axes From the graph we can see ...View the full answer
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Related Book For 
Cambridge International AS & A Level Mathematics Pure Mathematics 2 & 3 Coursebook
ISBN: 9781108407199
1st Edition
Authors: Sue Pemberton, Julianne Hughes, Julian Gilbey
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