subtract. Write your answer in simplest form. negative radical 7 minus 2 radical 7
To subtract expressions with radicals, you combine like terms. Here, we have two terms involving the square root of 7, which are like terms.
The expression is:
-√7 - 2√7
We can combine them by subtracting the coefficients of √7, treating √7 as a common variable:
-1√7 - 2√7 = (-1 - 2)√7
= -3√7
So, negative radical 7 minus 2 radical 7 is -3√7, which is the simplest form of this expression.