How do you find the sum or difference of $(3c^3-c+11)-(c^2+2c+8)$ ?

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Answer 1 · 2017-02-27T12:02:13

$3c^3-c^2-3c+3$

Using place keepers. For example: $0c^2$

$3c^3+0c^2-c+11$
$ul(color(white)(3x^3+)c^2+2c+8) larr" subtract"$
$3c^3-c^2-3c+3$

How do you find the sum or difference of (3c^3-c+11)-(c^2+2c+8)(3c^3-c+11)-(c^2+2c+8)?