Answer:
2(2x + 5)(2x - 5)
Step-by-step explanation:
First, take out the common factor of 2:
2(4x^2 - 25)
Then factor. Because they are differences of squares, this'll be easy:
2(2x + 5)(2x - 5)
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Answer:
11.6
Step-by-step explanation:
F = k/ d^2
where k = proportionality constant
k = Fd^2
k = 5 * 9^2
k = 5*81 = 405
d = (K/F)^1/2
d = (405/3)^1/2
d = 11.62 =11.6