Q. 46 - Intermediate Algebra

Question

In the following exercises, subtract the polynomials. 

$\left(10r^2-20r\right)-(r-8)$

Step-by-Step Solution

Answer

The result of subtracting the polynomials is $-5b-4$

Step 1. Given information

$\begin{array}{l}\text{The given expression is }\\ \left(10r^2-20r\right)-(r-8)\\ \text{We have to subtract the polynomials.}\end{array}$

Step 2. Subtracting the polynomials

$\begin{array}{l}\Rightarrow \left(10r^2-20r\right)-\left(r-8\right)\\ =10r^2-20r-r+8\left[\text{Rewrite without the parenthese}\right]\\ =10r^2-20r-r+8\left[\text{Combine the like terms}\right]\\ =10r^2-19r+8\end{array}$