Factor completely. 5x2 - 45 a. 5(x + 3)(x - 3) b. 5(x2 - 45) c. 5(x - 9)(x + 9) d. (5x + 9)(x - 5)

The correct answer is A. 5(x + 3)(x - 3)

Step-by-step explanation:

In order to solve this, we start by pulling out the greatest common factor.

5x^2 - 45

5(x^2 - 9)

Now we can use the difference of two squares to factor the rest of the equation.

5(x + 3)(x - 3)

i believe it is 0.1m because the measurement of 30.4m limits how precise you can be

you can only be as precise as the least precise measurement