Answer:

Step-by-step explanation:
Hello!
We can use the difference of square method.
<h2>Difference Of Squares (DOS)</h2>
The formula for the DOS is 
It is a simple way to factor polynomials.
The criteria:
- Has to begin and end with a perfect square
- The operation has to be subtraction
<h3>Factor:</h3>
Begins with a perfect square (x² * x²) and ends with a perfect square (4 * 4)
Warning! Watch out, there may be another DOS!
is another DOS
The x² + 4 is not a DOS because the operation is addition.
The final factored form is 
Answer:
the answer is X
Step-by-step explanation:
it is x
Answer:
45
Step-by-step explanation:
(7-4)=3
3^2=9
9*5=45
Answer:
D
Step-by-step explanation:
πr^2
3.14*3^2
3.14*9
28.26
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