How do you simplify $3r^2+ -8+ -10r^2+ -4r-r$ ?

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Answer 1 · 2016-11-11T13:01:12

$-7r^2 - 5r -8$

Step 1 is to group like terms and then combine like terms:

$3r^2 + -8 + -10r^2 + -4r - r =>$

$(3r^2 + -10r^2) + (-4r - r) + -8 =>$

$(3 + -10)r^2 + (-4 - 1)r + -8$

$-7r^2 + -5r + -8 =>$

$-7r^2 - 5r -8$

How do you simplify 3r^2+ -8+ -10r^2+ -4r-r3r^2+ -8+ -10r^2+ -4r-r?