Subtract 5x^2+2x-11 from 3x^2+8x-7. How to express the result as a trinomial?

bararskzs

bararskzs

Answered question

2023-01-09

Subtract 5x2+2x11 from 3x2+8x7. How to express the result as a trinomial?

Answer & Explanation

iJehovazhk

iJehovazhk

Beginner2023-01-10Added 8 answers

The incorrect subtraction of expressions is a common mistake in all subtraction operations. The key phrase here is "from."
3x2+8x7(5x2+2x11)    remove the bracket.
Note how the Signs have changed.
=3x2+8x75x22x+11
=2x2+6x+4
Another format which is useful if the expressions have many terms:
Write like terms under each other.
   3x2+8x7
   (5x2+2x11) removing the bracket changes the signs
   3x2+8x7
   5x22x+11
   2x2+6x+4
The inverse of adding can also be used to describe a subtraction.

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