I believe you are expected to simplify. To do this all you do is group like terms (x, x², x³ etc.) and then simplify the coefficients.
13. 10z + 7z - 19z² - 5z² - 17z
first you can rearrange and group like terms (remember the bring the sign in front of each term with it). I would do it like this:
-19z² - 5z² +10z + 7z - 17z
Now simplify the coefficients:
-24z² + 0z
you can omit the 0z and your simplified answer is
-24z²
Main thing to remember here is that z and z² cannot be simplified together, nor can any variable that has an exponent because the exponent makes them differ.
√5 is the wrong position This is approximately 2.24 so the dot should be between the 2 and 3 while she has put it between 1 and 2.
The first is an absolute value sign. But there is a - outside the first one so the -4 does become positive but then becomes negative again so you have -4
The second value is basically saying the same thing as -1x-4 which become a negative times a negative which is positive. You end up with 4.
So no it does not equal each other.
I do see an extra absolute value symbol though on the right side of the equal sign. But it looks like either way it would be -4 = 4 and that's not true. So either way it should be false.
The suquare root is 10. it is a rational number
Answer:
Step-by-step explanation:
Step 1:
Write the expression
Step 2: Expand 
Step 3: Collect similar terms
Step 4: Factor 4 out of the expression to prove that the expression is a multiple of 4.
