How do you simplify #(-12x^3+5x-23)-(4x^4+31-9x^3)#?

1 Answer
EZ as pi
Jun 6, 2018

# =-4x^4-3x^3 +5x-54#

Explanation:

In order to simplify you need to add the like terms.

Remove the brackets first.

#(-12x^3+5x-23)color(red)(-(4x^4+31-9x^3))#

#= -12x^3+5x-23 color(red)(-4x^4-31+9x^3)" "larr# note the signs

#=-4x^4-12x^3+9x^3 +5x-23-31" "larr# re-arrange

# =-4x^4-3x^3 +5x-54" "larr# add like terms

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