Answer:
is the correct answer.
Step-by-step explanation:
Difference of squares can be written as a^2 - b^2. This is equal to (a - b)(a + b)
In your answers, we see, 9a^2 - 4b^2. They are subtracting which is correct. 9 and 4 can also be rooted. 9 to 3 and 4 to 2 so
can be written as 
Answer:
and 
Step-by-step explanation:
This is a quadratic equation, so we start by rearranging its terms so we can apply the quadratic formula:
has two possible solutions given by:

So we rearrange the terms in the given quadratic equation bringing all terms to the left hhand side of the equal sign:

The solutions will then be:

Therefore the two possible answer are:
and 
Answer:
search khan academy and theres video about it, for some reason brainly wont let me put answers and the explanation.
Step-by-step explanation: