They all add 3 then subtract it by 4
Answer:
4√7
Step-by-step explanation:
5√7 + √7 - 2√7
add: 6√7 - 2√7
subtract: 4√7
Answer:


Step-by-step explanation:
is the expression given to be solved.
First of all let us have a look at <u>3 formulas</u>:

Both the formula can be applied to the expression(
) during the first step while solving it.
<u>Applying formula (1):</u>
Comparing the terms of
with 

So,
is reduced to 
<u>Applying formula (2):</u>
Comparing the terms of
with 

So,
is reduced to
.
So, the answers can be:


Answer: 18 c
Step-by-step explanation: since they have the same variables you can easily just add them together