Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions



This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
To subtract monomials, they have to be similar, that is to say, they must have the same literal part.

The difference of two or more monomials is another monomial whose literal part is the same and the coefficient is the difference between the coefficients.

axn − bxn = (a − b)xn

2x2y3z − 3x2y3z = 5x2y3z

The subtraction of two or more non-similar monomials is a polynomial.

2x2y3 + 3x2y3z

0 0 0
The explanation is correct, but in your example, the difference is wrong. Assuming the inner numbers 2 and 3 are exponents and not coefficients, the difference should be -x^2y^3z. (If they are not exponents, it should be written as 12xyz - 18xyz = -6xyz. See the difference?). The second example should be 2x^2y^3 - 3x^2y^3z., where inner numbers 2 and 3 are coefficients. :-)
Subtracting Monomials
To subtract Monomials, we have to subtract the numerical coefficients like in whole numbers, and then bring down the same literal coefficient. Take note that we can only subtract monomials having the same literal coefficient or variable.

4x - 2x 
4x + (-2x)
= 2x

4y + 2x
= 4y + 2x

7ab³ - 9ab³
7ab³ + (-9ab³)
= -2ab²

0 0 0
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts