✓ Correct answer: D. <tex>\displaystyle r^2 -2r +3</tex>To simplify, remove parentheses and combine like terms, remembering the ever-important step of applying the negative sign to each term within the second set of parentheses:<br/><br/><tex>\displaystyle 5r^2 +3r - 5 -4r^2 -5r +8</tex><br/><br/><tex>\displaystyle 5r^2 -4r^2 +3r-5r-5+8</tex><br/><br/><tex>\displaystyle r^2 -2r +3</tex>
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