How do you simplify $(3a^3 - 7a^2 + a) - (6a^3 - 4a^2 - 8)$ ?

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Answer 1 · 2015-06-11T07:55:13

$color(blue)(-3a^3) -color(red)(3a^2) + a+8$

$color(blue)(3a^3) - color(red)(7a^2) + a - color(blue)(6a^3) + color(red)(4a^2) + 8$

Grouping like terms:

$color(blue)(3a^3-6a^3) color(red)(-7a^2+ 4a^2)+ a +8$

$= color(blue)(-3a^3) -color(red)(3a^2) + a+8$

How do you simplify (3a^3 - 7a^2 + a) - (6a^3 - 4a^2 - 8)(3a^3 - 7a^2 + a) - (6a^3 - 4a^2 - 8)?