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Mathematics, 24.03.2020 01:07 bovalle

Error Analysis Kwan's work is shown below. What mistake did he make?
(5x2 – 3x + 1) - (2x2 - 4x - 2) = 5x2 - 3x + 1 - 2x2 - 4x - 2
5x2 – 2x2 – 3x - 4x + 1 - 2
= 3x2 – 7x - 1


Error Analysis Kwan's work is shown below. What mistake did he make? (5x2 – 3x + 1) - (2x2 - 4x - 2)

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Error Analysis Kwan's work is shown below. What mistake did he make?
(5x2 – 3x + 1) - (2x2 - 4...
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