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Answer:
−x²−4x+3−x+3
Subtract x from −4x.
−x²−5x+6
Step-by-step explanation:
The distribution lies within one of the standard of deviation of the mean so <span>68% </span>
The distribution lies within two of the standard of deviations of the mean so 95%
The distribution lies within three of the standard of deviations of the mean so 99.7%