A student attempts to solve the equation |3x + 4| = x. The student writes the following
Question:
A student attempts to solve the equation |3x + 4| = x. The student writes the following working:
Explain the error made by the student.
Transcribed Image Text:
3x + 4 = x 4 = 2x x = -2 or -(3x + 4) = x -3x 4 = x -4 = 4x x = -1 Solutions are x = -2 and x = -1. -
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Related Book For
Pearson Edexcel A Level Mathematics Pure Mathematics Year 2
ISBN: 9781292183404
1st Edition
Authors: Greg Attwood, Jack Barraclough, Ian Bettison, David Goldberg, Alistair Macpherson, Joe Petran
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